CHEM 1032 FALL 2017 Practice Exam 4 1. Which of the following reactions is spontaneous under normal and standard conditions?
|
|
- Joshua Pearson
- 6 years ago
- Views:
Transcription
1 1 CHEM 1032 FALL 2017 Practice Exam 4 1. Which f the fllwing reactins is spntaneus under nrmal and standard cnditins? A. 2 NaCl(aq) 2 Na(s) + Cl2(g) B. CaBr2(aq) + 2 H2O(aq) Ca(OH)2(aq) + 2 HBr(aq) C. AgNO3(aq) + KBr(aq) AgBr(s) + KNO3(aq) D. 3 CO2(g) + 4 H2O(g) C3H8(g) + 5 O2(g) 2. Place the fllwing gases rder f increasing mlar entrpy at STP: C3H8 CO2 N2O A. CO2 < C3H8 < N2O B. CO2 < N2O < C3H8 C. C3H8 < CO2 < N2O D. N2O < C3H8 < CO2 3. Which f the fllwing reactins has a value f ΔS that is negative? A. 2 NO(g) + O2(g) 2 NO2(g) B. NaClO3(s) Na + (aq) + ClO3 (aq) C. CH3OH(l) CO(g) + 2 H2(g) D. COCl2(g) CO(g) + Cl2(g) 4. Which f the fllwing statements is true? A. Exthermic prcesses are always spntaneus. B. Endthermic prcesses are never spntaneus. C. Endthermic prcesses increase the entrpy f the surrundings. D. Exthermic prcesses increase the entrpy f the surrundings. 5. Which f the fllwing statements is crrect? A. The ttal enthalpy f the earth is cnstant B. The entrpy f a perfect crystal at abslute zer is zer C. The ttal enthalpy f the universe is increasing D. Fr any nn-spntaneus prcess, the entrpy f the universe increases 6. The value f ΔS fr: N2H4(l) + H2(g) 2 NH3(g) is 134 J/K. Given that S fr N2H4(l) is 121 J/(ml K) and that fr H2(g) is 131 J/(ml K), what is the standard mlar entrpy f NH3(g)? A. 386 J/(ml K) B. 193 J/(ml K) C. 118 J/(ml K) D. 59 J/(ml K) 7. Estimate the value f ΔG fr: N2H4(l) + H2(g) 2 NH3(g) at 114 C, given ΔH = 142 kj and ΔS = 134 J/K. A. 157 kj B. 52,000 kj C. 194 kj D. 15,400 kj 8. Which f the fllwing relatinships is true? A. When K < 1, ΔG is negative B. ΔG = 0 at equilibrium C. When K > 1, ΔG is psitive D. ΔG = 0 at equilibrium
2 2 Fr questins 9-17: One f the imprtant reactins in a catalytic cnverter is: 2 CO(g) + 2 NO(g) N2(g) + 2 CO2(g). CO(g) NO(g) N2(g) CO2(g) ΔH f kj/ml S J/(ml. K) ΔG f kj/ml Is this a redx reactin? A. Yes B. N C. Insufficient infrmatin 10. What is the xidizing agent? A. CO(g) B. NO(g) C. N2(g) D. CO2(g) 11. What is the reducing agent? A. CO(g) B. NO(g) C. N2(g) D. CO2(g) 12. The change in entrpy fr this reactin is: A. Psitive B. Negative C. Insufficient infrmatin 13. This reactin is: A. Exthermic B. Endthermic C. Insufficient infrmatin 14. At 25 C this reactin is: A. Spntaneus B. Nn-spntaneus C. Insufficient infrmatin 15. Will the reactin be spntaneus at all temperatures? A. Yes B. N C. Insufficient infrmatin 16. If the reactin was at equilibrium, i.e.: 2 CO(g) + 2 NO(g) N2(g) + 2 CO2(g), the value f the equilibrium cnstant, K, at 25 C wuld be: A B. 1.8 x C. 1.3 D. 5.4 x If the partial pressures f all gases was 2.0 atm, the value f ΔG at 1000 K wuld be: A kj B. 695 kj C. 689 kj D. 683 kj
3 Fr questins 18-22: The redx reactin: Cr2O7 2 (aq) + NO(aq) Cr 3+ (aq) + NO3 (aq), ccurs in acidic slutin. The xidatin numbers f O and H in all reactants and prducts are 2 and +1, respectively. 18. The xidatin numbers fr Cr in Cr2O7 2 and in Cr 3+ are, respectively: A. +12 and +3 B. +6 and +3 C. +7 and +3 D. +14 and The xidatin numbers fr N in NO and in NO3 are, respectively: A. +2 and +4 B. +1 and +3 C. +2 and +3 D. +2 and In the reductin half reactin, each Cr atm in Cr2O7 2 : A. gains 3 e B. lses 3 e C. gains 6 e D. lses 6 e 21. In the xidatin half reactin, the N atm in NO: A. gains 3 e B. lses 3 e C. gains 6 e D. lses 6 e 22. In the balanced redx reactin: a Cr2O7 2 (aq) + b NO(g) + c H + (aq) Cr 3+ (aq) + NO3 (aq) + H2O(l) A. a = 1, b = 1, c = 10 B. a = 2, b = 1, c = 7 C. a = 1, b = 2, c = 6 D. a = 2, b = 1, c = 12 3 Fr questins 23-31: The electrchemical cell: M(s) M x+ (aq) Ag + (aq) Ag(s) was assembled and fund t prduce a vltage f V when the cncentratin f the slutins was 1.00 M at 25 C. Use this infrmatin and the table f standard reductin ptentials: 23. The cathde is: A. M(s) B. M x+ (aq) C. Ag(s) D. Ag + (aq) 24. What is being xidized? A. M(s) B. M x+ (aq) C. Ag(s) D. Ag + (aq) 25. Electrns flw frm: A. M t Ag B. Ag t M C. Ag + t M x+ D. M x+ t Ag The catins in the salt bridge flw int the: A. ande cell B. cathde cell
4 4 27. If the mass f the electrdes is mnitred during the reactin we wuld find that: A. Ag decreases, M decreases B. Ag increases, M decreases C. Ag increases, M increases D. Ag decreases, M increases 28. The metal M is: A. Fe B. Al C. Mg D. Au 29. Hw many electrns are transferred frm the reducing agent t the xidizing agent? A. 1 B. 2 C. 3 D The value f ΔG fr the reactin at 25 C is: A. 475 kj B kj C. 237 kj D. 712 kj 31. If M x+ (aq) has a cncentratin f 2.00 M and Ag + (aq) has a cncentratin f 5.00 x 10 3 M, the cell ptential at 25 C under these nn-standard cnditins wuld be: A V B V C V D V Fr questins 32-33: Use the fllwing standard reductin ptentials: O2 + 4 H e 2 H2O I2 + 2 e 2 I E = V E = V 2 H2O + 2 e H2 + 2 OH E = 0.83 V K + + e K E = 2.92 V 32. Electrlysis f mlten KI(l) will prduce: A. K(s) at the ande, I2(s) at the cathde B. I2(s) at the ande, K(s) at the cathde C. O2(g) at the ande, I2(s) at the cathde D. I2(s) at the ande, H2(g) at the cathde 33. Electrlysis f an aqueus slutin f KI(aq) will prduce: A. K(s) at the ande, I2(s) at the cathde B. I2(s) at the ande, K(s) at the cathde C. O2(g) at the ande, I2(s) at the cathde D. I2(s) at the ande, H2(g) at the cathde 34. Hw lng will it take t depsit 1.32 g f cpper frm a CuSO4(aq) slutin using a current f amps? A. 70 min B. 60 min C. 35 min D. 4.2 x 10 3 min
5 5
6 6 Useful Infrmatin: 0 ºC = 273 K R = J/(ml K) S surr = G = H T S G = G ΔH T G = RTlnK cell cathde E = E E cell + RTlnQ ande G = nfe F = 96,485 C/ml e 1 Amp = E cell = lgk (at T = 25 C) n Ecell = E cell lgq (at T = 25 C) n 1Culmb 1secnd
Find 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 112, Fall 05 (Weis/Garman) Exam 4A, December 14, 2005 (Print Clearly) +2 points
+2 pints Befre yu begin, make sure that yur exam has all 7 pages. There are 14 required prblems (7 pints each) and tw extra credit prblems (5 pints each). Stay fcused, stay calm. Wrk steadily thrugh yur
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 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 informationChapter 19. Electrochemistry. Dr. Al Saadi. Electrochemistry
Chapter 19 lectrchemistry Part I Dr. Al Saadi 1 lectrchemistry What is electrchemistry? It is a branch f chemistry that studies chemical reactins called redx reactins which invlve electrn transfer. 19.1
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 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 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 informationCHEM 116 Electrochemistry at Non-Standard Conditions, and Intro to Thermodynamics
CHEM 116 Electrchemistry at Nn-Standard Cnditins, and Intr t Thermdynamics Imprtant annuncement: If yu brrwed a clicker frm me this semester, return it t me at the end f next lecture r at the final exam
More informationIn the half reaction I 2 2 I the iodine is (a) reduced (b) oxidized (c) neither of the above
6.3-110 In the half reactin I 2 2 I the idine is (a) reduced (b) xidized (c) neither f the abve 6.3-120 Vitamin C is an "antixidant". This is because it (a) xidizes readily (b) is an xidizing agent (c)
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 informationCHEMISTRY 16 HOUR EXAM IV KEY April 23, 1998 Dr. Finklea. 1. The anti-cancer drug cis-platin is the complex: cis-[pt(nh ) (Cl) ]. In this complex, the
CHEMISTRY 16 HOUR EXAM IV KEY April 23, 1998 Dr. Finklea Sme useful cnstants: ln(10) = 2.303, R = 8.314 J/ml@K, F = 96,00 cul/ml, 2.303RT/F = 0.0916 V at 2EC. Assume a temperature f 2EC unless tld therwise.
More informationEntropy, Free Energy, and Equilibrium
Nv. 26 Chapter 19 Chemical Thermdynamics Entrpy, Free Energy, and Equilibrium Nv. 26 Spntaneus Physical and Chemical Prcesses Thermdynamics: cncerned with the questin: can a reactin ccur? A waterfall runs
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 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 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 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 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 informationChapter 8 Reduction and oxidation
Chapter 8 Reductin and xidatin Redx reactins and xidatin states Reductin ptentials and Gibbs energy Nernst equatin Disprprtinatin Ptential diagrams Frst-Ebswrth diagrams Ellingham diagrams Oxidatin refers
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 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 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 informationStrategy Write the two half-cell reactions and identify the oxidation and reduction reactions. Pt H2 (g) H + (aq)
Slutins manual fr Burrws et.al. Chemistry 3 Third editin 16 Electrchemistry Answers t wrked examples WE 16.1 Drawing a cell diagram (n p. 739 in Chemistry 3 ) Draw a cell diagram fr an electrchemical cell
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 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 informationCHAPTER 21 ELECTROCHEMISTRY: CHEMICAL CHANGE AND ELECTRICAL WORK
CHAPTR 1 LCTROCHMISTRY: CHMICAL CHANG AND LCTRICAL WORK 1.1 Oxidatin is the lss f electrns (resulting in a higher xidatin number), while reductin is the gain f electrns (resulting in a lwer xidatin number).
More informationPart One: Heat Changes and Thermochemistry. This aspect of Thermodynamics was dealt with in Chapter 6. (Review)
CHAPTER 18: THERMODYNAMICS AND EQUILIBRIUM Part One: Heat Changes and Thermchemistry This aspect f Thermdynamics was dealt with in Chapter 6. (Review) A. Statement f First Law. (Sectin 18.1) 1. U ttal
More informationCHAPTER 6 / HARVEY A. CHEMICAL EQUILIBRIUM B. THERMODYNAMICS AND EQUILIBRIUM C. MANUPULATING EQUILIBRIUM CONSTANTS
CHPTER 6 / HRVEY. CHEMICL B. THERMODYNMICS ND C. MNUPULTING CONSTNTS D. CONSTNTS FOR CHEMICL RECTIONS 1. Precipitatin Reactins 2. cid-base Reactins 3. Cmplexatin Reactins 4. Oxidatin-Reductin Reactins
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 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 informationElectrochemistry. Half-Reactions 1. Balancing Oxidation Reduction Reactions in Acidic and Basic Solutions
Electrchemistry Half-Reactins 1. Balancing Oxidatin Reductin Reactins in Acidic and Basic Slutins Vltaic Cells 2. Cnstructin f Vltaic Cells 3. Ntatin fr Vltaic Cells 4. Cell Ptential 5. Standard Cell Ptentials
More informationElectrochemistry. Learning Objectives. Half-Reactions 1. Balancing Oxidation Reduction Reactions in Acidic and Basic Solutions
Electrchemistry 1 Learning Objectives Electrchemistry Balancing Oxidatin Reductin Reactins in Acidic and Basic Slutins a. Learn the steps fr balancing xidatin reductin reactins using the half-reactin methd.
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 informationCHEM 1032 PRACTICE EXAM IV CLASS SPRING 2017
1 CHEM 1032 PRACTICE EXAM IV CLASS SPRING 2017 (You may need a periodic table. Useful information is on the last page). 1. Which of the following is a non-spontaneous reaction under standard conditions?
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 informationChemistry: Electrochemistry-1
Chemistry: Electrchemistry-1 Slved Prblems Objective Prblem 1: Slutin: Prblem : Slutin: In the electrlysis f CuCl slutin using Cu electrdes, the weight f Cu ande increased by gram at cathde. In the ande.
More informationCHM 112 Chapter 16 Thermodynamics Study Guide
CHM 112 Chapter 16 Thermodynamics Study Guide Remember from Chapter 5: Thermodynamics deals with energy relationships in chemical reactions Know the definitions of system, surroundings, exothermic process,
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 informationWhat factors influence how far a reaction goes and how fast it gets there?
. What s in a slutin? Hw far des a reactin g? 2. What factrs influence hw far a reactin ges and hw fast it gets there? 3. Hw d atmic and mlecular structure influence bserved prperties f substances? Big
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 information18:00-21:00, 15 April, 2016 (Total Score: 106 points)
Chemistry II Midterm Exam 18:00-21:00, 15 April, 2016 (Ttal Scre: 106 pints) R = 0.08206 atm L/ml K = 8.314 J/ ml K = 0.08314 bar L/ml K F = 96500 C/ml 1. Please answer the fllwing questins. (ttal 16%)
More informationGOAL... ability to predict
THERMODYNAMICS Chapter 18, 11.5 Study f changes in energy and transfers f energy (system < = > surrundings) that accmpany chemical and physical prcesses. GOAL............................. ability t predict
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 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 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 informationDownloaded from
ELECTROCHEMISTRY ONE Mark Each 1. The difference between the electrde ptentials f tw electrdes when n current is drawn thrugh the cell is called.. Under what cnditin an electrchemical cell can behave like
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 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 informationCH Practice Exam #2
CH1810 - Practice Exam #2 Part I - Multiple Choice - Choose the best answer and place the letter corresponding to the answer in the space provided. 1. Consider the following reaction and its equilibrium
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 informationTuesday, 5:10PM FORM A March 18,
Name Chemistry 153-080 (3150:153-080) EXAM II Multiple-Chice Prtin Instructins: Tuesday, 5:10PM FORM A March 18, 2003 120 1. Each student is respnsible fr fllwing instructins. Read this page carefully.
More information1022_3rd Exam_
1022_3rd Exam_1030521 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) For the following example, identify the following. H2O(l) H2O(g) A) a negative
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 informationSpontaneous Processes, Entropy and the Second Law of Thermodynamics
Chemical Thermdynamics Spntaneus Prcesses, Entrpy and the Secnd Law f Thermdynamics Review Reactin Rates, Energies, and Equilibrium Althugh a reactin may be energetically favrable (i.e. prducts have lwer
More informationSCH4U: End of Year Review
SCH4U: End f Year Review Unit 1: Energy and Rates 2 1) When 13.4 g f ammnium chlride disslve int 2.00x10 g f water the temperature changes frm 20.0 C t 15.3 C. Determine the mlar enthalpy f slutin f ammnium
More informationCh 18 Electrochemistry 電化學
Ch 18 Electrchemistry 電化學 Electrchemistry is the study f the intercnversin f electrical and chemical energy. This cnversin takes place in an electrchemical cell. 1. Vltaic cell. ( 伏打電池 ). Electrlytic cell.
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 informationEnergies of Phase Changes (Some review from Chapter 6, Some New)
. What s in a slutin? Hw far des a reactin g? 2. What factrs influence hw far a reactin ges and hw fast it gets there? 3. Hw d atmic and mlecular structure influence bserved prperties f substances? A Macrscpic
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 informationName:. Correct Questions = Wrong Questions =.. Unattempt Questions = Marks =
Name:. Crrect Questins = Wrng Questins =.. Unattempt Questins = Marks = 1. Which metal reacts mst vigrusly with water? (A) Al (B) Ca (C) Fe (D) K 2. Which are strng acids? I. HI II. HNO 3 III. H 2 SO 3
More information2-July-2016 Chemsheets A Page 1
www.chemsheets.c.uk 2-July-2016 Chemsheets A2 1076 Page 1 SECTION 1 AS REDOX REVISION 1) Oxidatin states When using xidatin states, we effectively imagine everything t be an in the xidatin state is the
More informationDraft for Review June 2017
CHEMISTRY 12 Big Ideas Reactin Kinetics Reactants must cllide t react, and the reactin rate is dependent n the surrunding cnditins. Elabratins Sample pprtunities t supprt inquiry with students: What factrs
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 informationCh. 14 In-Class Exercise
1 Chemistry 123/125 Ch. 14 In-Class Exercise Many physical and chemical processes proceed naturally in one direction, but not in the other. In other words, these processes are spontaneous in the direction
More informationTypes of Energy COMMON MISCONCEPTIONS CHEMICAL REACTIONS INVOLVE ENERGY
CHEMICAL REACTIONS INVOLVE ENERGY The study energy and its transrmatins is knwn as thermdynamics. The discussin thermdynamics invlve the cncepts energy, wrk, and heat. Types Energy Ptential energy is stred
More informationSPONTANEITY, ENTROPY, AND FREE ENERGY
CHAER 7 SONANEIY, ENROY, AND FREE ENERGY Questins. Living rganisms need an external surce f energy t carry ut these prcesses. Green plants use the energy frm sunlight t prduce glucse frm carbn dixide and
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 of Waterloo DEPARTMENT OF CHEMISTRY CHEM 123 Test #2 Wednesday, March 11, 2009
University f Waterl DEPARTMENT OF CHEMISTRY CHEM 13 Test # Wednesday, March 11, 009 This is test versin 001. Fill in vals 001 fr the Card Number (r Test Master) n yur cmputer answer card. Name (Print in
More informationEntropy and Gibbs energy
14 Entrpy and Gibbs energy Answers t wrked examples WE 14.1 Predicting the sign f an entrpy change (n p. 658 in Chemistry 3 ) What will be the sign f the value f S fr: (a) crystallizatin f salt frm a slutin;
More informationCHM 152 Exam 4 Review Ch KEY
CHM 152 Exam 4 Review Ch. 18 19 KEY 1. Predict whether the entropy change will be positive or negative for the following: a. H 2 O (g) H 2 O (l) S - b. C 6 H 12 O 6 (s) 2C 2 H 5 OH(l) + 2CO 2 (g) S +_
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 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 informationCHE 105 Exam 2 Fall 15
CHE 105 Exam 2 Fall 15 Question #: 1 Which of the following statements is(are) true for ionic bonds? Select all that apply. A. These bonds typically form between a metal and a nonmetal. B. The formation
More informationChapter 3 Homework Solutions
Chapter Hmewrk Slutins. n = ml = 5 C = 98 K = 5 C = 98 K p = atm p = 5 atm. Cpm = (5/)R he entrpy changes fr the heating and cmpressin can e calculated separately and added. Heat at cnstant pressure S
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 1001 Problem Set #3: Entropy and Free Energy
CHEM 1001 Prblem Set #3: Entry and Free Energy 19.7 (a) Negative; A liquid (mderate entry) cmbines with a slid t frm anther slid. (b)psitive; One mle f high entry gas frms where n gas was resent befre.
More informationSupporting information
Electrnic Supplementary Material (ESI) fr Physical Chemistry Chemical Physics This jurnal is The wner Scieties 01 ydrgen perxide electrchemistry n platinum: twards understanding the xygen reductin reactin
More informationThermochemistry Lecture
Thermochemistry Lecture Jennifer Fang 1. Enthalpy 2. Entropy 3. Gibbs Free Energy 4. q 5. Hess Law 6. Laws of Thermodynamics ENTHALPY total energy in all its forms; made up of the kinetic energy of the
More informationMaking and Experimenting with Voltaic Cells. I. Basic Concepts and Definitions (some ideas discussed in class are omitted here)
Making xperimenting with Vltaic Cells I. Basic Cncepts Definitins (sme ideas discussed in class are mitted here) A. Directin f electrn flw psitiveness f electrdes. If ne electrde is mre psitive than anther,
More informationCH 223 Sample Exam Exam II Name: Lab Section:
Exam II Name: Lab Section: Part I: Multiple Choice Questions (100 Points) Use a scantron sheet for Part I. There is only one best answer for each question. 1. Which of the following equations is the solubility
More informationCHEMISTRY Practice Exam #2
CHEMISTRY 1710 - Practice Exam #2 Section 1 - This section of the exam is multiple choice. Choose the BEST answer from the choices which are given. 1. Which of the following solutions will have the highest
More informationNCERT THERMODYNAMICS SOLUTION
NCERT THERMODYNAMICS SOLUTION 1. Choose the correct answer. A thermodynamic state function is a quantity (i) used to determine heat changes (ii) whose value is independent of path (iii) used to determine
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 information8. A piece of Mg(s) ribbon is held in a Bunsen burner flame and begins to burn according to the equation: 2Mg(s) + O2 (g) 2MgO(s).
1. Which event must always occur for a chemical reaction to take place? A) formation of a precipitate B) formation of a gas C) effective collisions between reacting particles D) addition of a catalyst
More informationCh 10 Practice Problems
Ch 10 Practice Problems 1. Which of the following result(s) in an increase in the entropy of the system? I. (See diagram.) II. Br 2(g) Br 2(l) III. NaBr(s) Na + (aq) + Br (aq) IV. O 2(298 K) O 2(373 K)
More informationUnit 8: Equilibrium Unit Review
1. Predict the effect of increasing pressure on the position of equilibrium in the following systems: a. CH 4 (g) + 2H 2 O(g) CO 2 (g) + 4H 2 (g) b. N 2 O 5 (g) + NO(g) 3NO 2 (g) c. NO(g) + NO 2 (g) N
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 information25. A typical galvanic cell diagram is:
Unit VI(6)-III: Electrochemistry Chapter 17 Assigned Problems Answers Exercises Galvanic Cells, Cell Potentials, Standard Reduction Potentials, and Free Energy 25. A typical galvanic cell diagram is: The
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 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 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 informationTHE ANSWER KEY TO THIS EXAM WILL BE POSTED ON BULLETIN BOARD #4 IN THE HALLWAY EAST OF ROOM 1002 GILMAN AND ON THE CHEM 167 WEBSITE.
PROF. JOHN VERKADE SPRING 2005 THIS EXAM CONSISTS OF 3 QUESTIONS ON 9 PAGES CHEM 67 HOUR EXAM II FEBRUARY 28, 2005 SEAT NO. NAME RECIT. INSTR. RECIT. SECT. GRADING PAGE Page 2 Page 3 Page 4 Page 5 Page
More informationCHAPTER 22 THE ELEMENTS IN NATURE AND INDUSTRY
CHAPTER THE ELEMENTS IN NATURE AND INDUSTRY.1 It is abundant in the universe since its simple atms were the first created after the Big Bang. H has the lwest density f any material, s it is nly weakly
More informationThermochemistry. The study of energy changes that occur during chemical : at constant volume ΔU = q V. no at constant pressure ΔH = q P
Thermchemistry The study energy changes that ccur during chemical : at cnstant vlume ΔU = q V n at cnstant pressure = q P nly wrk Fr practical reasns mst measurements are made at cnstant, s thermchemistry
More informationUnit 3. Electrochemistry
Unit 3 Electrcheistry One ark questins 1. What is an electrlyte? An electrlyte is a cpund which cnducts electricity either in its aqueus slutin r in its lten state. e.g Acids HCl, CH 3 COOH, HNO 3 Bases
More information1.0 Fundamentals. Fig Schematic diagram of an electrochemical cell.
1 1.0 Fundamentals This chapter intrduces the electrchemical cell, its cmpnents, basic definitins, and the prcesses that take place during electrlysis. The difference between thermdynamics and kinetics
More informationGibbs Free Energy Study Guide Name: Date: Period:
Gibbs Free Energy Study Guide Name: Date: Period: The basic goal of chemistry is to predict whether or not a reaction will occur when reactants are brought together. Ways to predict spontaneous reactions
More informationElectrochemical Reactions
Electrchemical Reactins The first chemical prcess t prduce electricity was described in 1800 by the Italian scientist Alessandr Vlta, a frmer high schl teacher. Acting n the hypthesis that tw dissimilar
More informationReview Material for Exam #2
Review Material fr Eam # 1. a. Calculate the mlarity f a slutin made with 184.6 mg sample f ptassium dichrmate disslved in enugh water t give 500.0 ml f slutin. 1 g 184.6 mg K Cr O 1 mle K Cr O 7 7 1000
More information19 Applications of Standard Electrode Potentials
9 Applicatins f Standard lectrde Ptentials ( Calculating thermdynamic cell ptentials ( Calculating equilibrium cnstants fr redx reactins ( Cnstructing redx titratin curves 9A Calculating Ptentials f lectrchemical
More information