N 2 (g) + 3H 2 (g) 2NH 3 (g) o Three mole ratios can be derived from the balanced equation above: Example: Li(s) + O 2 (g) Li 2 O(s)
|
|
- Caroline Ruby Russell
- 6 years ago
- Views:
Transcription
1 Chapter 9 - Stichimetry Sectin 9.1 Intrductin t Stichimetry Types f Stichimetry Prblems Given is in mles and unknwn is in mles. Given is in mles and unknwn is in mass (grams). Given is in mass and unknwn is in mles. Given is in mass and unknwn is in mass. Writing and Using Mle Ratis Mle Rati: a cnversin factr derived frm the cefficients f a balanced chemical equatin interpreted in terms f mles. In chemical calculatins, mle ratis are used t cnvert between: N 2 (g) + 3H 2 (g) 2NH 3 (g) Three mle ratis can be derived frm the balanced equatin abve: Example: Li(s) + O 2 (g) Li 2 O(s) Sectin 9.2 Ideal Stichimetric Calculatins Mle-Mle Calculatins Hw many mles f ammnia (NH 3 ) are prduced when 0.60 ml f N 2 reacts with H 2. Step 1: Write ut equatin and balance it Step 2: Determine mle rati f knwn (N 2 ) t unknwn (NH 3 ). Step 3: Multiply given amunt f knwn by the crrect mle rati that will cancel ut the knwn units, leaving yu the unknwn units 1
2 Example: Hw many mles f Chlrine are prduced when 3.2 mles sdium chlride decmpses? Hmewrk: pg 301 #2 and pg 311 #1 a, b (balance reactin and then a & b each have 3 answers) Mle-Mass Calculatins Hw many grams f aluminum xide(al 2 O 3 ) are prduced when 0.50ml Al reacts with O 2? Step 1: Write ut equatin and balance it Step 2: Multiply by the mle rati t get frm knwn t unknwn mles. Step 3: Multiply the mles f unknwn by the mlar mass f the unknwn t get grams. Example: Hw many grams f Cpper are needed t react with Sulfur t frm 5.40 mles f cpper sulfide? Mass-Mle Calculatins Calculate the number f mles f H 2 O prduced by the reactin f 5.40 g f O 2 with an excess f H 2. *excess means that there is enugh t react. Step 1: Write ut equatin and balance it. Step 2: Multiply the given amunt by the mlar mass f the knwn t get mles. Step 3: Multiply by the mle rati t get frm knwn t unknwn mles. Example: Hw many mles f hydrgen are needed t react with nitrgen t frm 10.5 grams f ammnia (NH 3 )? 2
3 Example: Hw many mles f Lithium are frmed by the decmpsitin f 3.40 grams f Lithium Oxide? Mass-Mass Calculatins Calculate the number f grams f CO prduced by the reactin f 3.25 g f C with an excess f O 2. Step 1: Write ut equatin and balance it. Step 2: Multiply the given amunt by the mlar mass f the knwn t get mles. Step 3: Multiply by the mle rati t get frm knwn t unknwn mles. Step 4: Multiply the mles f unknwn by the mlar mass f the unknwn t get grams. Example: Hw many grams f Oxygen are needed t make 20.0 grams f NO 2? 2NO + O 2 2NO 2 Example: Hw many grams f SO 3 are prduced when 55.3 grams f SO 2 reacts with an excess f O 2. Hmewrk: pg 311 #2-4 3
4 Sectin 9.3 Limiting Reactants and Percentage Yield Limiting reactant: the substance that determines the amunt f prduct that can be frmed by a reactin. Excess reactant: the substance that is nt cmpletely used up in a reactin. Keep in mind that the reactant that is present in the smaller amunt by mass r vlume is nt necessarily the limiting reactant. Determining Limiting Reactant What is the limiting reactant when 80.0g Cu reacts with 25.0g S? 2Cu(s) + S(s) Cu2S(s) Using the grams f reactant given, determine the mles f reactant. *Have Using the balanced chemical equatin, determine the mle rati. Multiply the mles f ne reactant by the mle rati t get the needed amunt f the ther reactant and cmpare t the amunt yu have. *When yu need mre than yu have, that is yur limiting reactant. *When yu have mre than yu need, that is yur excess reactant. Example: If 4.00 ml C 2 H 4 is reacted with 9.50 ml O 2, identify the limiting reactant and calculate the mles f excess reactant remaining. C 2 H 4 (g) + 3O 2 (g) 2CO 2 (g) + 2H 2 O(g) *Since we already have mles, we knw what we have, we just have t find what we need. Using a Limiting Reactant t Find Quantity f a Prduct What is the maximum number f grams f Cu 2 S that can be frmed when 45.0g Cu reacts with 24.0g S? 2Cu(s) + S(s) Cu 2 S(s) Find the limiting reactant and then use the mles f limiting reactant t calculate mles and then grams f Cu 2 S. Limiting Reactant is, s we use the given amunt f t find grams f Cu 2 S 4
5 Example Calculate the mles f I 2 prduced when 80.0g I 2 O 5 reacts with 28.0g CO. I 2 O 5 (g) + 5CO(g) 5CO 2 (g) + I 2 (g) Limiting Reactant is, s we use the given amunt f t find mles f I 2. We already have cnverted t mles in the first part, s start with mles. Hmewrk: page 321 #22-23 Percent Yield Theretical Yield: the maximum amunt f prduct that culd be frmed frm given amunts f reactants. Actual Yield: the amunt f prduct that actually frms when the reactin is carried ut in the labratry. Percent Yield: the rati f the actual yield t the theretical yield expressed as a percent. Percent Yield = actual yield x 100% units can be gram r ml, as theretical yield lng as they are the same. The percent yield is a measure f the f a reactin carried ut in the labratry. Factrs that can cause the actual yield t be less than the theretical yield: Calculating Theretical Yield What is the theretical yield in grams f CaO if 24.8g CaCO 3 is heated? CaCO 3 (s) CaO(s) + CO 2 (g) Calculate the theretical yield by cnverting the mass f the reactant t the mass f the prduct, using mlar mass and mle ratis. 5
6 Example What is the theretical yield f AlCl 3 when 3.00ml Al reacts with an excess f Cl 2? 2Al + 3Cl 2 2AlCl 3 Calculating Percent Yield What is the percent yield if 13.1g CaO is actually prduced when 24.8g CaCO 3 is heated? CaCO 3 (s) CaO(s) + CO 2 (g) Find the theretical yield (13.9g CaO) and plug bth the theretical and actual yields int the percent yield equatin. Example What is the percent yield if 2.85ml AlCl 3 is actually prduced when 3.00ml Al reacts with an excess f Cl 2? 2Al + 3Cl 2 2AlCl 3 Anther Way T Lk At It Think f percent yield as a grade n a test. The Theretical Yield is the number f pints pssible: 70 pts The Actual Yield is the number f pints yu earned: 64 pts Percent yield = 64/70 x 100% = 91% Hmewrk: page 318 #1 & 3 6
4 Fe + 3 O 2 2 Fe 2 O 3
UNIT 7: STOICHIOMETRY NOTES (chapter 9) INTRO TO STOICHIOMETRY Reactin Stichimetry: Stichimetry is simply a way t shw f smething this is. Relatinship between a given and an unknwn: GIVEN UNKNOWN Type 1
More informationA Chemical Reaction occurs when the of a substance changes.
Perid: Unit 8 Chemical Reactin- Guided Ntes Chemical Reactins A Chemical Reactin ccurs when the f a substance changes. Chemical Reactin: ne r mre substances are changed int ne r mre new substances by the
More information**continued on next page**
Chapter 9 Stoichiometry Section 9.1 Introduction to Stoichiometry Standard.e.: Students know how to calculate the masses of reactant and products in a chemical reaction from the mass of one of the reactants
More informationEdexcel IGCSE Chemistry. Topic 1: Principles of chemistry. Chemical formulae, equations and calculations. Notes.
Edexcel IGCSE Chemistry Tpic 1: Principles f chemistry Chemical frmulae, equatins and calculatins Ntes 1.25 write wrd equatins and balanced chemical equatins (including state symbls): fr reactins studied
More informationUnit 9: The Mole- Guided Notes What is a Mole?
Unit 9: The Mle- Guided Ntes What is a Mle? A mle is a name fr a specific f things Similar t a r a One mle is equal t 602 602,000,000,000,000,000,000,000 That s 602 with zers A mle is NOT an abbreviatin
More informationSemester 2 AP Chemistry Unit 12
Cmmn In Effect and Buffers PwerPint The cmmn in effect The shift in equilibrium caused by the additin f a cmpund having an in in cmmn with the disslved substance The presence f the excess ins frm the disslved
More informationFind this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site.
Find this material useful? Yu can help ur team t eep this site up and bring yu even mre cntent cnsider dnating via the lin n ur site. Still having truble understanding the material? Chec ut ur Tutring
More informationHow can standard heats of formation be used to calculate the heat of a reaction?
Name Chem 161, Sectin: Grup Number: ALE 28. Hess s Law and Standard Enthalpies Frmatin (Reerence: Chapter 6 - Silberberg 5 th editin) Imprtant!! Fr answers that invlve a calculatin yu must shw yur wrk
More informationChapter 9 Chemical Reactions NOTES
Chapter 9 Chemical Reactins NOTES Chemical Reactins Chemical reactin: Chemical change 4 Indicatrs f Chemical Change: (1) (2) (3) (4) Cnsist f reactants (starting materials) and prducts (substances frmed)
More informationWhen a substance heats up (absorbs heat) it is an endothermic reaction with a (+)q
Chemistry Ntes Lecture 15 [st] 3/6/09 IMPORTANT NOTES: -( We finished using the lecture slides frm lecture 14) -In class the challenge prblem was passed ut, it is due Tuesday at :00 P.M. SHARP, :01 is
More informationExamples: 1. How much heat is given off by a 50.0 g sample of copper when it cools from 80.0 to 50.0 C?
NOTES: Thermchemistry Part 1 - Heat HEAT- TEMPERATURE - Thermchemistry: the study f energy (in the frm f heat) changes that accmpany physical & chemical changes heat flws frm high t lw (ht cl) endthermic
More informationHess Law - Enthalpy of Formation of Solid NH 4 Cl
Hess Law - Enthalpy f Frmatin f Slid NH 4 l NAME: OURSE: PERIOD: Prelab 1. Write and balance net inic equatins fr Reactin 2 and Reactin 3. Reactin 2: Reactin 3: 2. Shw that the alebraic sum f the balanced
More informationUnit 11 Solutions- Guided Notes. What are alloys? What is the difference between heterogeneous and homogeneous mixtures?
Name: Perid: Unit 11 Slutins- Guided Ntes Mixtures: What is a mixture and give examples? What is a pure substance? What are allys? What is the difference between hetergeneus and hmgeneus mixtures? Slutins:
More informationUnit 14 Thermochemistry Notes
Name KEY Perid CRHS Academic Chemistry Unit 14 Thermchemistry Ntes Quiz Date Exam Date Lab Dates Ntes, Hmewrk, Exam Reviews and Their KEYS lcated n CRHS Academic Chemistry Website: https://cincchem.pbwrks.cm
More informationChemistry 114 First Hour Exam
Chemistry 114 First Hur Exam Please shw all wrk fr partial credit Name: (4 pints) 1. (12 pints) Espress is made by frcing very ht water under high pressure thrugh finely grund, cmpacted cffee. (Wikipedia)
More informationHow can standard heats of formation be used to calculate the heat of a reaction?
Answer Key ALE 28. ess s Law and Standard Enthalpies Frmatin (Reerence: Chapter 6 - Silberberg 4 th editin) Imprtant!! Fr answers that invlve a calculatin yu must shw yur wrk neatly using dimensinal analysis
More informationChemistry/ Biotechnology Reference Sheets
Cmmn Metric Prefixes: Giga (G) = 1,000,000,000 = Kil (k) = 1,000 = Deci (d) =.1 = Milli (m) =.001 = Nan (n) =.000000001 = 9 6 1 10 Mega (M) = 1,000,000 = 1 10 0 1 10 Basic unit = meter, gram, liter, secnd
More informationAP Chemistry Assessment 2
AP Chemistry Assessment 2 DATE OF ADMINISTRATION: January 8 January 12 TOPICS COVERED: Fundatinal Tpics, Reactins, Gases, Thermchemistry, Atmic Structure, Peridicity, and Bnding. MULTIPLE CHOICE KEY AND
More informationFind this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site.
Find this material useful? Yu can help ur team t keep this site up and bring yu even mre cntent cnsider dnating via the link n ur site. Still having truble understanding the material? Check ut ur Tutring
More informationThermodynamics and Equilibrium
Thermdynamics and Equilibrium Thermdynamics Thermdynamics is the study f the relatinship between heat and ther frms f energy in a chemical r physical prcess. We intrduced the thermdynamic prperty f enthalpy,
More informationSolutions to the Extra Problems for Chapter 14
Slutins t the Extra Prblems r Chapter 1 1. The H -670. T use bnd energies, we have t igure ut what bnds are being brken and what bnds are being made, s we need t make Lewis structures r everything: + +
More informationFind this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site.
Find this material useful? Yu can help ur team t keep this site up and bring yu even mre cntent cnsider dnating via the link n ur site. Still having truble understanding the material? Check ut ur Tutring
More informationFind this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site.
Find this material useful? Yu can help ur team t keep this site up and bring yu even mre cntent cnsider dnating via the link n ur site. Still having truble understanding the material? Check ut ur Tutring
More informationThree Definitions of Acids/Bases Type Acid Base Problems with it Arrhenius Bronsted-Lowry Lewis. NH 3(aq) + H 2O(l)
CP NT Ch 19: Acid and Bases An Intrductin Prperties f Acids 1. taste 2. Can prduce H + ( ) ins ( ) 3. Change the clr f litmus frm t 4. Reacts with such as Zn and Mg t prduce gas. Ba(s) + H 2SO 4 BaSO 4(aq)
More information15.0 g Cr = 21.9 g Cr O g Cr 4 mol Cr mol Cr O
WYSE Academic Challenge Sectinal Chemistry Exam 2008 SOLUTION SET 1. Crrect answer: B. Use PV = nrt t get: PV = nrt 2. Crrect answer: A. (2.18 atm)(25.0 L) = n(0.08206 L atm/ml K)(23+273) n = 2.24 ml Assume
More informationCHEM 103 Calorimetry and Hess s Law
CHEM 103 Calrimetry and Hess s Law Lecture Ntes March 23, 2006 Prf. Sevian Annuncements Exam #2 is next Thursday, March 30 Study guide, practice exam, and practice exam answer key are already psted n the
More informationUnit 13 Acids and Bases. Name: Period: TEST: Wednesday 4/27/16
Unit 13 Acids and Bases Name: Perid: TEST: Wednesday 4/27/16 1 Unit 13 Acids and Bases Calendar Mnday Tuesday Wednesday Thursday Friday APRIL 7th Slutins Test 8 th Vide: Acids & Bases Ntes #1 Acids and
More informationAP CHEMISTRY CHAPTER 6 NOTES THERMOCHEMISTRY
AP CHEMISTRY CHAPTER 6 NOTES THERMOCHEMISTRY Energy- the capacity t d wrk r t prduce heat 1 st Law f Thermdynamics: Law f Cnservatin f Energy- energy can be cnverted frm ne frm t anther but it can be neither
More informationChem 111 Summer 2013 Key III Whelan
Chem 111 Summer 2013 Key III Whelan Questin 1 6 Pints Classify each f the fllwing mlecules as plar r nnplar? a) NO + : c) CH 2 Cl 2 : b) XeF 4 : Questin 2 The hypthetical mlecule PY 3 Z 2 has the general
More informationCHEM Thermodynamics. Change in Gibbs Free Energy, G. Review. Gibbs Free Energy, G. Review
Review Accrding t the nd law f Thermdynamics, a prcess is spntaneus if S universe = S system + S surrundings > 0 Even thugh S system
More informationA.P. CHEMISTRY. SOLUTIONS AND ACID BASE CHEMISTRY. p 1
A.P. CHEMISTRY. SOLUTIONS AND ACID BASE CHEMISTRY. p 1 (Nte: questins 1 t 14 are meant t be dne WITHOUT calculatrs!) 1.Which f the fllwing is prbably true fr a slid slute with a highly endthermic heat
More informationChapter 4 Thermodynamics and Equilibrium
Chapter Thermdynamics and Equilibrium Refer t the fllwing figures fr Exercises 1-6. Each represents the energies f fur mlecules at a given instant, and the dtted lines represent the allwed energies. Assume
More informationChemistry 132 NT. Electrochemistry. Review
Chemistry 132 NT If yu g flying back thrugh time, and yu see smebdy else flying frward int the future, it s prbably best t avid eye cntact. Jack Handey 1 Chem 132 NT Electrchemistry Mdule 3 Vltaic Cells
More informationChapters 29 and 35 Thermochemistry and Chemical Thermodynamics
Chapters 9 and 35 Thermchemistry and Chemical Thermdynamics 1 Cpyright (c) 011 by Michael A. Janusa, PhD. All rights reserved. Thermchemistry Thermchemistry is the study f the energy effects that accmpany
More informationLecture 12: Chemical reaction equilibria
3.012 Fundamentals f Materials Science Fall 2005 Lecture 12: 10.19.05 Chemical reactin equilibria Tday: LAST TIME...2 EQUATING CHEMICAL POTENTIALS DURING REACTIONS...3 The extent f reactin...3 The simplest
More informationActivity 2 Dimensional Analysis
Activity 2 Dimensinal Analysis Gals! Develp cnversin factrs frm cmmn equalities.! Use cnversin factrs t cnvert between different units f measure.! Apply the cncept f dimensinal analysis t string tgether
More informationAcids and Bases Lesson 3
Acids and Bases Lessn 3 The ph f a slutin is defined as the negative lgarithm, t the base ten, f the hydrnium in cncentratin. In a neutral slutin at 25 C, the hydrnium in and the hydrxide in cncentratins
More informationChapter One. Matter and Energy - Chemistry the study of matter and its changes the "central science" Natural Laws
Chapter One Matter and Measurement http://www.chemistry.armstrng.edu/ nivens/curse_list.htm OWL HOMEWORK REQUIRED!!! Matter and Energy - Chemistry the study f matter and its changes the "central science"
More informationAccelerated Chemistry POGIL: Half-life
Name: Date: Perid: Accelerated Chemistry POGIL: Half-life Why? Every radiistpe has a characteristic rate f decay measured by its half-life. Half-lives can be as shrt as a fractin f a secnd r as lng as
More informationFind this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site.
Find this material useful? Yu can help ur team t keep this site up and bring yu even mre cntent cnsider dnating via the link n ur site. Still having truble understanding the material? Check ut ur Tutring
More informationBIT Chapters = =
BIT Chapters 17-0 1. K w = [H + ][OH ] = 9.5 10 14 [H + ] = [OH ] =.1 10 7 ph = 6.51 The slutin is neither acidic nr basic because the cncentratin f the hydrnium in equals the cncentratin f the hydride
More information/ / Chemistry. Chapter 1 Chemical Foundations
Name Chapter 1 Chemical Fundatins Advanced Chemistry / / Metric Cnversins All measurements in chemistry are made using the metric system. In using the metric system yu must be able t cnvert between ne
More informationCHAPTER Read Chapter 17, sections 1,2,3. End of Chapter problems: 25
CHAPTER 17 1. Read Chapter 17, sectins 1,2,3. End f Chapter prblems: 25 2. Suppse yu are playing a game that uses tw dice. If yu cunt the dts n the dice, yu culd have anywhere frm 2 t 12. The ways f prducing
More informationCHM 152 Practice Final
CM 152 Practice Final 1. Of the fllwing, the ne that wuld have the greatest entrpy (if cmpared at the same temperature) is, [a] 2 O (s) [b] 2 O (l) [c] 2 O (g) [d] All wuld have the same entrpy at the
More informationLecture 16 Thermodynamics II
Lecture 16 Thermdynamics II Calrimetry Hess s Law Enthalpy r Frmatin Cpyright 2013, 2011, 2009, 2008 AP Chem Slutins. All rights reserved. Fur Methds fr Finding H 1) Calculate it using average bnd enthalpies
More informationElectrochemistry. Reduction: the gaining of electrons. Reducing agent (reductant): species that donates electrons to reduce another reagent.
Electrchemistry Review: Reductin: the gaining f electrns Oxidatin: the lss f electrns Reducing agent (reductant): species that dnates electrns t reduce anther reagent. Oxidizing agent (xidant): species
More informationChemical Equilibrium
0.110/5.60 Fall 005 Lecture #10 age 1 Chemical Equilibrium Ideal Gases Questin: What is the cmsitin f a reacting miture f ideal gases? e.g. ½ N (g, T, ) + 3/ H (g, T, ) = NH 3 (g, T, ) What are N,, and
More informationDifferentiation Applications 1: Related Rates
Differentiatin Applicatins 1: Related Rates 151 Differentiatin Applicatins 1: Related Rates Mdel 1: Sliding Ladder 10 ladder y 10 ladder 10 ladder A 10 ft ladder is leaning against a wall when the bttm
More informationSection 5.8 Notes Page Exponential Growth and Decay Models; Newton s Law
Sectin 5.8 Ntes Page 1 5.8 Expnential Grwth and Decay Mdels; Newtn s Law There are many applicatins t expnential functins that we will fcus n in this sectin. First let s lk at the expnential mdel. Expnential
More informationCHAPTER PRACTICE PROBLEMS CHEMISTRY
Chemical Kinetics Name: Batch: Date: Rate f reactin. 4NH 3 (g) + 5O (g) à 4NO (g) + 6 H O (g) If the rate f frmatin f NO is 3.6 0 3 ml L s, calculate (i) the rate f disappearance f NH 3 (ii) rate f frmatin
More informationChapter 17 Free Energy and Thermodynamics
Chemistry: A Mlecular Apprach, 1 st Ed. Nivald Tr Chapter 17 Free Energy and Thermdynamics Ry Kennedy Massachusetts Bay Cmmunity Cllege Wellesley Hills, MA 2008, Prentice Hall First Law f Thermdynamics
More informationhttps://goo.gl/eaqvfo SUMMER REV: Half-Life DUE DATE: JULY 2 nd
NAME: DUE DATE: JULY 2 nd AP Chemistry SUMMER REV: Half-Life Why? Every radiistpe has a characteristic rate f decay measured by its half-life. Half-lives can be as shrt as a fractin f a secnd r as lng
More informationLecture 13: Electrochemical Equilibria
3.012 Fundamentals f Materials Science Fall 2005 Lecture 13: 10.21.05 Electrchemical Equilibria Tday: LAST TIME...2 An example calculatin...3 THE ELECTROCHEMICAL POTENTIAL...4 Electrstatic energy cntributins
More informationIn other words, atoms are not created nor destroyed in chemical reaction.
CUNTING Physcisal Methds Chemical Methds by numbers 1 pr = 2 1 dz = 12 1 case = 12 r 24 1 hand = 5 fingers 1 ft = 12 inches Avgadr's number = 6.02x10 +23 anything anything by weighing 1 gummy bear = 1
More informationES201 - Examination 2 Winter Adams and Richards NAME BOX NUMBER
ES201 - Examinatin 2 Winter 2003-2004 Adams and Richards NAME BOX NUMBER Please Circle One : Richards (Perid 4) ES201-01 Adams (Perid 4) ES201-02 Adams (Perid 6) ES201-03 Prblem 1 ( 12 ) Prblem 2 ( 24
More informationCHEM 2400/2480. Lecture 19
Lecture 19 Metal In Indicatr - a cmpund whse clur changes when it binds t a metal in - t be useful, it must bind the metal less strngly than EDTA e.g. titratin f Mg 2+ with EDTA using erichrme black T
More informationAdvanced Chemistry Practice Problems
Advanced Chemistry Practice Prblems Thermdynamics: Gibbs Free Energy 1. Questin: Is the reactin spntaneus when ΔG < 0? ΔG > 0? Answer: The reactin is spntaneus when ΔG < 0. 2. Questin: Fr a reactin with
More informationChemistry 1A Fall 2000
Chemistry 1A Fall 2000 Midterm Exam III, versin B Nvember 14, 2000 (Clsed bk, 90 minutes, 155 pints) Name: SID: Sectin Number: T.A. Name: Exam infrmatin, extra directins, and useful hints t maximize yur
More informationUniversity Chemistry Quiz /04/21 1. (10%) Consider the oxidation of ammonia:
University Chemistry Quiz 3 2015/04/21 1. (10%) Cnsider the xidatin f ammnia: 4NH 3 (g) + 3O 2 (g) 2N 2 (g) + 6H 2 O(l) (a) Calculate the ΔG fr the reactin. (b) If this reactin were used in a fuel cell,
More informationThermodynamics Partial Outline of Topics
Thermdynamics Partial Outline f Tpics I. The secnd law f thermdynamics addresses the issue f spntaneity and invlves a functin called entrpy (S): If a prcess is spntaneus, then Suniverse > 0 (2 nd Law!)
More informationNUPOC STUDY GUIDE ANSWER KEY. Navy Recruiting Command
NUPOC SUDY GUIDE ANSWER KEY Navy Recruiting Cmmand CHEMISRY. ph represents the cncentratin f H ins in a slutin, [H ]. ph is a lg scale base and equal t lg[h ]. A ph f 7 is a neutral slutin. PH < 7 is acidic
More informationALE 21. Gibbs Free Energy. At what temperature does the spontaneity of a reaction change?
Name Chem 163 Sectin: Team Number: ALE 21. Gibbs Free Energy (Reference: 20.3 Silberberg 5 th editin) At what temperature des the spntaneity f a reactin change? The Mdel: The Definitin f Free Energy S
More informationExamples: Everything in the universe is made up of matter. How atoms are form the. Solids Liquids Gases. The a substance has, If a substance has
Matter What is Matter? Examples: Everything in the universe is made up f matter Hw atms are frm the The States f Matter There are main states f matter Slids Liquids Gases What causes the different States
More informationFinals Study Guide. AP Chemistry. Spring Made by Ashley Thomas
Spring 2016 Finals Study Guide AP Chemistry Table f Cntents Sectin 1: Acids and Bases 1.1 Titratins 1.2 Indicatrs 1.3 Buffers 1.4 Slutin Preparatin Sectin 2: Calrimetry 2.1 Specific Heat 2.2 Metals Sectin
More informationCHE 105 EXAMINATION III November 11, 2010
CHE 105 EXAMINATION III Nvember 11, 2010 University f Kentucky Department f Chemistry READ THESE DIRECTIONS CAREFULLY BEFORE STARTING THE EXAMINATION! It is extremely imprtant that yu fill in the answer
More information2004 AP CHEMISTRY FREE-RESPONSE QUESTIONS
2004 AP CHEMISTRY FREE-RESPONSE QUESTIONS 6. An electrchemical cell is cnstructed with an pen switch, as shwn in the diagram abve. A strip f Sn and a strip f an unknwn metal, X, are used as electrdes.
More informationStudent Exploration: Cell Energy Cycle
Name: Date: Student Explratin: Cell Energy Cycle Vcabulary: aerbic respiratin, anaerbic respiratin, ATP, cellular respiratin, chemical energy, chlrphyll, chlrplast, cytplasm, glucse, glyclysis, mitchndria,
More informationCHEM 1413 Chapter 6 Homework Questions TEXTBOOK HOMEWORK
CHEM 1413 Chapter 6 Hmewrk Questins TEXTBOOK HOMEWORK 6.25 A 27.7-g sample f the radiatr clant ethylene glycl releases 688 J f heat. What was the initial temperature f the sample if the final temperature
More informationFind this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site.
Find this material useful? Yu can help ur team t keep this site up and bring yu even mre cntent cnsider dnating via the link n ur site. Still having truble understanding the material? Check ut ur Tutring
More informationChem 75 February 16, 2017 Exam 2 Solutions
1. (6 + 6 pints) Tw quick questins: (a) The Handbk f Chemistry and Physics tells us, crrectly, that CCl 4 bils nrmally at 76.7 C, but its mlar enthalpy f vaprizatin is listed in ne place as 34.6 kj ml
More informationLecture 4. The First Law of Thermodynamics
Lecture 4. The First Law f Thermdynamics THERMODYNAMICS: Basic Cncepts Thermdynamics: (frm the Greek therme, meaning "heat" and, dynamis, meaning "pwer") is the study f energy cnversin between heat and
More informationREVIEW QUESTIONS Chapter 18. H = H (Products) - H (Reactants) H (Products) = (1 x -125) + (3 x -271) = -938 kj
Chemistry 102 ANSWER KEY REVIEW QUESTIONS Chapter 18 1. Calculate the heat reactin ( H ) in kj/ml r the reactin shwn belw, given the H values r each substance: NH (g) + F 2 (g) NF (g) + HF (g) H (kj/ml)
More informationThermochemistry. Thermochemistry
Thermchemistry Petrucci, Harwd and Herring: Chapter 7 CHEM 1000A 3.0 Thermchemistry 1 Thermchemistry The study energy in chemical reactins A sub-discipline thermdynamics Thermdynamics studies the bulk
More informationName AP CHEM / / Chapter 1 Chemical Foundations
Name AP CHEM / / Chapter 1 Chemical Fundatins Metric Cnversins All measurements in chemistry are made using the metric system. In using the metric system yu must be able t cnvert between ne value and anther.
More informationLifting a Lion: Using Proportions
Overview Students will wrk in cperative grups t slve a real-wrd prblem by using the bk Hw D yu Lift a Lin? Using a ty lin and a lever, students will discver hw much wrk is needed t raise the ty lin. They
More informationSCIENCE 10: CHEMISTRY,
, 1 Atmic Thery and Bnding The Nucleus - The particles that make up an atm are called subatmic particles - The three subatmic particles are prtns, neutrns and electrns. - Prtns, which have a +1 (psitive)
More informationAlgebra2/Trig: Trig Unit 2 Packet
Algebra2/Trig: Trig Unit 2 Packet In this unit, students will be able t: Learn and apply c-functin relatinships between trig functins Learn and apply the sum and difference identities Learn and apply the
More informationConcept Category 2. Trigonometry & The Unit Circle
Cncept Categry 2 Trignmetry & The Unit Circle Skill Checklist Use special right triangles t express values f fr the six trig functins Evaluate sine csine and tangent using the unit circle Slve tw-step
More informationFind this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site.
Find this material useful? Yu can help ur team t keep this site up and bring yu even mre cntent cnsider dnating via the link n ur site. Still having truble understanding the material? Check ut ur Tutring
More informationSpecific Heat of Substances
Specific Heat f Substances EXPERIMENT Equipment 1. MeasureNet temperature prbe. Tw 110 alchl r mercury thermmeters 3. Tw 1 z (355 ml) styrfam cups 4. One 3 3 cardbard lid with a 1 cm diameter hle in the
More informationLIMITING REAGENT. Taking Stoichiometric conversions one step further
LIMITING REAGENT Taking Stoichiometric conversions one step further Limiting Reagent The reactant that limits the amount of product that can be formed. The reaction will stop when all of the limiting reactant
More informationChapter Outline 4/28/2014. P-V Work. P-V Work. Isolated, Closed and Open Systems. Exothermic and Endothermic Processes. E = q + w
Islated, Clsed and Open Systems 9.1 Energy as a Reactant r a Prduct 9.2 Transferring Heat and Ding Wrk 9.5 Heats f Reactin and Calrimetry 9.6 Hess s Law and Standard Heats f Reactin 9.7 Heats f Reactin
More informationTopic 9 Nitrogen compounds Revision Notes
Tpic 9 Nitrgen cmpunds Revisin Ntes 1) Amines - intrductin In primary amines, a nitrgen atm is attached t ne alkyl grup and tw hydrgen atms. The general frmula fr a primary amine is RNH2 The simplest amine
More informationMaterials o o o o o o o o o
Experiment 3: Measurements, the Metric System & Density Objective The purpse f experiment is t becme familiar with the metric system by taking measurements using metric. Additinally, the purpse f this
More informationGeneral Chemistry II, Unit II: Study Guide (part 1)
General Chemistry II, Unit II: Study Guide (part 1) CDS Chapter 21: Reactin Equilibrium in the Gas Phase General Chemistry II Unit II Part 1 1 Intrductin Sme chemical reactins have a significant amunt
More informationSTUDENT REVIEW PACKET ANSWER KEY
STUDENT REVIEW PACKET ANSWER KEY Molar Mass - Find the masses of the following. Show all work: 1) N 2 2(14.0) = 28.0 g/mole 2) H 2 O 2(1.0) + 1(16.0) = 18.0 g/mole 3) NaCl 1(23.0) + 1(35.5) = 58.5 g/mole
More informationCH. 12 STOICHIOMETRY
CH. 12 STOICHIOMETRY Balanced Chemical Equations Used to calculate: How much of each reactant is needed How much product will form If you know one quantity you can calculate the rest. Quantity may be in
More informationCHE101WB GENERAL CHEMISTRY Lecture & Lab Syllabus Winter 2012
CHE101WB GENERAL CHEMISTRY Lecture & Lab Syllabus Winter 2012 Instructr: Nifiatis, F., Ph.D., M.B.A. Office: Ward Hall 234 Phne: (518) 564-2703 E-mail: Ftis.Nifiatis@Plattsburgh.edu COURSE OBJECTIVE The
More informationChapter 17: Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes
Chapter 17: hermdynamics: Spntaneus and Nnspntaneus Reactins and Prcesses Learning Objectives 17.1: Spntaneus Prcesses Cmparing and Cntrasting the hree Laws f hermdynamics (1 st Law: Chap. 5; 2 nd & 3
More informationIn the spaces provided, explain the meanings of the following terms. You may use an equation or diagram where appropriate.
CEM1405 2007-J-2 June 2007 In the spaces prvided, explain the meanings f the fllwing terms. Yu may use an equatin r diagram where apprpriate. 5 (a) hydrgen bnding An unusually strng diple-diple interactin
More informationNUMBERS, MATHEMATICS AND EQUATIONS
AUSTRALIAN CURRICULUM PHYSICS GETTING STARTED WITH PHYSICS NUMBERS, MATHEMATICS AND EQUATIONS An integral part t the understanding f ur physical wrld is the use f mathematical mdels which can be used t
More informationChem 163 Section: Team Number: ALE 24. Voltaic Cells and Standard Cell Potentials. (Reference: 21.2 and 21.3 Silberberg 5 th edition)
Name Chem 163 Sectin: Team Number: ALE 24. Vltaic Cells and Standard Cell Ptentials (Reference: 21.2 and 21.3 Silberberg 5 th editin) What des a vltmeter reading tell us? The Mdel: Standard Reductin and
More information188 CHAPTER 6 THERMOCHEMISTRY
188 CHAPTER 6 THERMOCHEMISTRY 4. a. ΔE = q + w = J + 100. J = 77 J b. w = PΔV = 1.90 atm(.80 L 8.0 L) = 10.5 L atm ΔE = q + w = 50. J + 1060 = 1410 J c. w = PΔV = 1.00 atm(9.1 L11. L) = 17.9 L atm 101.
More informationA. Lattice Enthalpies Combining equations for the first ionization energy and first electron affinity:
[15.1B Energy Cycles Lattice Enthalpy] pg. 1 f 5 CURRICULUM Representative equatins (eg M+(g) M+(aq)) can be used fr enthalpy/energy f hydratin, inizatin, atmizatin, electrn affinity, lattice, cvalent
More information( ) kt. Solution. From kinetic theory (visualized in Figure 1Q9-1), 1 2 rms = 2. = 1368 m/s
.9 Kinetic Mlecular Thery Calculate the effective (rms) speeds f the He and Ne atms in the He-Ne gas laser tube at rm temperature (300 K). Slutin T find the rt mean square velcity (v rms ) f He atms at
More informationThis section is primarily focused on tools to aid us in finding roots/zeros/ -intercepts of polynomials. Essentially, our focus turns to solving.
Sectin 3.2: Many f yu WILL need t watch the crrespnding vides fr this sectin n MyOpenMath! This sectin is primarily fcused n tls t aid us in finding rts/zers/ -intercepts f plynmials. Essentially, ur fcus
More information5.0 minutes. The temperature rose from
QUESTION 1 The table belw describes features cmmn t a slutin calrimeter and a bmb calrimeter as well as differences. Features f Bth the Slutin and Bmb alrimeters W X Features f the Bmb alrimeter Only Y
More informationLesson 8: Types of Matter
NOTES Name: Date: Class: Lessn 8: Types f Matter Matter: anything that has and takes up Examples f matter: Examples that are NOT matter: _ 1 Pure substances: Elements and Cmpunds a material that has a
More informationFind this material useful? You can help our team to keep this site up and bring you even more content consider donating via the link on our site.
Find this material useful? Yu can help ur team t keep this site up and bring yu even mre cntent cnsider dnating via the link n ur site. Still having truble understanding the material? Check ut ur Tutring
More informationSECTION I (Multiple Choice Questions)
ANDHERI / BORIVALI / DADAR / CHEMBUR / THANE / MULUND/ NERUL / POWAI IIT JEE - 09 CRASH COURSE (MAIN) MARKS:90 TIME: 5 MIN. TOPIC: CHEMICAL & IONIC EQUILIBRIUM DATE:9//8 SECTION I (Multiple Chice Questins)
More information