Directions: Complete the following assignment using any resources you have EXCEPT other people. This assignment will be graded as a take-home quiz.
|
|
- Buddy Barrett
- 6 years ago
- Views:
Transcription
1 Explain Equilibrium Directions: Complete the following assignment using any resources you have EXCEPT other people. This assignment will be graded as a take-home quiz. 1) A reversible reaction is shown below with its equilibrium constant, Kc, at 25 o C. 2 A(g) + B(g) 2 C(g) Kc > 1 at 25 o C (a) Two moles each of the gases A, B, and C are mixed in a rigid 1 L container and allowed to react. (i) Write an expression for Qc, and determine the value of Qc at the instant that the gases are mixed. (1 point) (ii) The value of Qc is observed to be greater than the value of Kc in this system at some point. Explain what this observation implies about the changes that will occur in the container after that point. (1 point) (iii) Compare the value of Qc determined in part (a)(i) with Kc. Explain what this comparison implies about the relative rates for the forward and reverse reactions, and describe how those rates will change with time. (1 point) (b) The particulate diagram to the right represents an equal number of moles of A and B molecules in the container, separated by a removable barrier. After the barrier is removed, the reaction proceeds to equilibrium, at which point the concentration of A has decreased from 0.40 M, immediately after the barrier was removed, to an equilibrium concentration of 0.10 M.
2 (i) Draw a particulate diagram, similar to the one above but with the barrier removed, that represents the concentrations of A, B, and C in the container at equilibrium. Explain the reasoning used to determine the concentrations. (1 point) (ii) Use your diagram to determine a value for Kc for this reaction. Justify your answer. (1 point) (c) Assume that the reaction described in part (b) takes about 2 minutes to reach equilibrium. Sketch a concentration vs. time graph showing the changes in the concentrations of A, B, and C over a span of 4 minutes. Use values of 0 to 4 minutes for the x-axis and 0 to 0.4 M for the y-axis of your graph. Explain the relationships among the changes in concentration for each species in the reaction. (2 points)
3 (d) Another reaction, W + Y 2 Z has Kc = 2.5 x 10-9 at 25 o C, but at a higher temperature, T2, the value of Kc for this reaction is reduced to 8.0 x (i) Is this reaction, as written, endothermic or exothermic? Explain your reasoning. (1 point) (ii) If 0.20 mol of W is mixed with 0.10 mol of Y in a 1.0 L container at temperature T2, what will be the concentrations of W, Y, and Z at equilibrium? Justify your response. (2 points) 2) Solid ammonium chloride (NH4Cl) placed in a sealed, evacuated container decomposes until it reaches equilibrium, as shown in the reaction below. NH4Cl(s) NH3(g) + HCl(g) ΔH o = +176 kj/molrxn at 25 o C (a) Write an expression for Qp, and explain how Qp can be used to predict whether a system is at equilibrium. (1 point)
4 (b) Explain how each of the following changes affects the equilibrium of the reaction, including any changes to the values of Q and K for the reaction. (i) Adding a small amount of NH4Cl(s). (1 point) (ii) Decreasing the volume. (1 point) (iii) Increasing the temperature. (1 point) 3) One of the simplest equilibrium systems occurs when a compound can switch between two isomers, such as with cis-2-pentene and trans-2-pentene. This reaction is shown in the equation to the right. At 127 o C, the isomers are gases. A sample of pure cis- 2-pentene is placed in a rigid, previously evacuated container and allowed to come to equilibrium. The concentrations of the two isomers versus time are shown in the graph to the right. (a) Based on the graph, determine the value of Kc for the reaction, and justify your answer. (1 point)
5 The reaction is started at a different temperature with another pure sample of cis-2-pentene. The changes in concentrations as the reaction proceeds to equilibrium can be represented by the particulate diagrams below. (b) Explain how the forward and reverse reaction rates change as the system moves from the start to equilibrium. (1 point) (c) Draw a concentration vs. time graph with two curves that represent the changes in the concentrations of cis-2-pentene and trans-2-pentene from the start to equilibrium, as shown in the particulate diagram above, given an initial concentration of 0.10 M cis-2-pentene. Explain your reasoning for each curve. (2 points)
January 03, Ch 13 SB equilibrium.notebook
Ch 13: Chemical Equilibrium exists when 2 opposing reactions occur simultaneously at the same rate (dynamic rather than static) Forward rate = reverse rate https://www.youtube.com/watch?v=wld_imyqagq The
More informationChemical Equilibrium
Saturday X-tra X-Sheet: 17 Key Concepts Chemical Equilibrium This lesson focuses on the following: Terminologies used in chemical equilibrium Representation of chemical equilibrium using graphs The Equilibrium
More informationAP* General Equilibrium Free Response Questions page 1
AP* General Equilibrium Free Response Questions page 1 General Equilibrium Problems 1983 Sulfuryl chloride, SO 2 Cl 2, is a highly reactive gaseous compound. When heated, it decomposes as follows: SO 2
More informationCHEM 1423 Chapter 17 Homework Questions TEXTBOOK HOMEWORK
CHEM 1423 Chapter 17 Homework Questions TEXTBOOK HOMEWORK 17.29 At 425 o C, Kp = 4.18x10-9 for the reaction 2HBr(g) H 2 (g) + Br 2 (g) In one experiment, 0.20 atm of HBr(g), 0.010 atm of H 2 (g), and 0.010
More information3.2.2 Kinetics. Maxwell Boltzmann distribution. 128 minutes. 128 marks. Page 1 of 16
3.2.2 Kinetics Maxwell Boltzmann distribution 128 minutes 128 marks Page 1 of 16 Q1. The diagram shows the Maxwell Boltzmann distribution for a sample of gas at a fixed temperature. E a is the activation
More information3.2.2 Kinetics. Effect of temperature. 145 minutes. 145 marks. Page 1 of 22
3.. Kinetics Effect of temperature 145 minutes 145 marks Page 1 of Q1. (a) State what is meant by the term activation energy of a reaction. (b) (c) State in general terms how a catalyst increases the rate
More informationKEY: FREE RESPONSE. Question Ammonium carbamate, NH 4CO 2NH 2, reversibly decomposes into CO 2 and NH 3 as shown by the balanced equation below.
KEY: FREE RESPONSE Question 1 1. Ammonium carbamate, NH 4CO 2NH 2, reversibly decomposes into CO 2 and NH 3 as shown by the balanced equation below. NH 4CO 2NH 2(s) 2 NH 3(g) + CO 2(g) K p =? A student
More informationB 2 Fe(s) O 2(g) Fe 2 O 3 (s) H f = -824 kj mol 1 Iron reacts with oxygen to produce iron(iii) oxide as represented above. A 75.
1 2004 B 2 Fe(s) + 3 2 O 2(g) Fe 2 O 3 (s) H f = -824 kj mol 1 Iron reacts with oxygen to produce iron(iii) oxide as represented above. A 75.0 g sample of Fe(s) is mixed with 11.5 L of O 2 (g) at 2.66
More informationAP Questions: Kinetics
AP Questions: Kinetics 1972 2 A + 2 B C + D The following data about the reaction above were obtained from three experiments: Rate of Formation of [A] [B] C (mole. liter -1 min -1 ) 1 0.60 0.15 6.3 10-3
More informationAP Chemistry Chapter 16 Assignment. Part I Multiple Choice
Page 1 of 7 AP Chemistry Chapter 16 Assignment Part I Multiple Choice 1984 47. CH 4 (g) + 2 O 2 (g) CO 2 (g) + 2 H 2 O(l) H = 889.1 kj H f H 2 O(l) = 285.8 kj mol 1 H f CO 2 (g) = 393.3 kj mol 1 What is
More informationUnit 9 Kinetics SA Review
1. Base your answer to the following question on the information below. The equilibrium equation below is related to the manufacture of a bleaching solution. In this equation, means that chloride ions
More informationName period AP Unit 8: equilibrium
Name period AP Unit 8: equilibrium 1. What is equilibrium? Rate of the forward reaction equals the rate of the reverse reaction 2. How can you tell when equilibrium has been reached? The concentrations
More informationQ1. (a) State what is meant by the term activation energy of a reaction. (1)
Q1. (a) State what is meant by the term activation energy of a reaction. (c) State in general terms how a catalyst increases the rate of a chemical reaction. The curve below shows the Maxwell Boltzmann
More informationEquilibrium. Reversible Reactions. Chemical Equilibrium
Equilibrium Reversible Reactions Chemical Equilibrium Equilibrium Constant Reaction Quotient Le Chatelier s Principle Reversible Reactions In most chemical reactions, the chemical reaction can be reversed,
More informationName Chemistry Exam #8 Period: Unit 8: Kinetics, Thermodynamics, & Equilibrium
1. Which quantities must be equal for a chemical reaction at equilibrium? (A) the potential energies of the reactants and products (B) the concentrations of the reactants and products (C) the activation
More informationWorksheet 18 - Equilibrium. Balance the following reaction, and use it to answer the following 8 questions:
Worksheet 18 - Equilibrium Balance the following reaction, and use it to answer the following 8 questions: N 2 (g) + H 2 (g) NH 3 (g) 1. Starting with 0.500 M N 2 and 0.800 M H 2, the reaction is allowed
More informationUnit 2: Chemical Kinetics Chemistry 30
Practice Questions Section 3.2 Factors Influencing Reaction Rate - Activation Energy 1. Answer the following questions based on the potential energy diagram shown here: a. Does the graph represent an endothermic
More informationCHEMICAL EQUILIBRIUM. Chapter 15
Chapter 15 P a g e 1 CHEMICAL EQUILIBRIUM Examples of Dynamic Equilibrium Vapor above a liquid is in equilibrium with the liquid phase. rate of evaporation = rate of condensation Saturated solutions rate
More information1B Equilibrium. 3) Equilibrium is a dynamic state At equilibrium the rate in both directions must be the same.
1B Equilibrium The equilibrium constant, K c Characteristics of the equilibrium state 1) Equilibrium can only be established in a closed system. Matter cannot be exchanged with the surroundings (this will
More information10 Reaction rates and equilibrium Answers to practice questions. OCR Chemistry A. number 1 (a) 1: The enthalpy change, H;
1 (a) 1: The enthalpy change, H; 2: The activation energy, E a 1 (b) H is unaffected as it is the difference between the reactants and products E a decreases as a catalyst allows an alternative route of
More informationHow would we know if equilibrium has been reached? Or if it will be reach?
1 How would we know if equilibrium has been reached? Or if it will be reach? The reaction quotient, Q, or trial KC, enables us to determine this information. The reaction quotient is determined by using
More informationPractice Test F.1 (pg 1 of 7) Unit F - General Equilibrium Kp and Kc Name Per
Practice Test F. (pg of 7) Unit F - General Equilibrium Kp and Kc Name Per This is practice - Do NOT cheat yourself of finding out what you are capable of doing. Be sure you follow the testing conditions
More informationNAME: Chapter 14Chemical Kinetics (Reaction Rate Law Concepts)
NAME: Chapter 14Chemical Kinetics (Reaction Rate Law Concepts) 1. Go to the website : http://www.chm.davidson.edu/vce/kinetics/index.html, a. Go to reaction rates page, read the introductory paragraphs
More information[A] a [B] b [C] c [D] d
Unit 4, Lesson #4: Calculations using The quilibrium Constant For the general homogeneous, reversible chemical reaction: aa + bb cc + dd At equilibrium, when the rate of the forward and reverse reactions
More informationAP* General Equilibrium Free Response Questions page 1
AP* General Equilibrium Free Response Questions page 1 General Equilibrium Problems 1983 Sulfuryl chloride, SO 2 Cl 2, is a highly reactive gaseous compound. When heated, it decomposes as follows: SO 2
More informationCHEMICAL - EQUILIBRIA
. Favourable conditions for manufacture of ammonia by the reaction, N + H NH ; H =.9 kcal are: (a) Low temperature, low pressure and catalyst (b) Low temperature, high pressure and catalyst (c) High temperature,
More informationName. Chem 116 Sample Examination #2
page 1 of 8 Name Last 5 digits of Student Number: XXX X Chem 116 Sample Examination #2 This exam consists of eight (8) pages, including this cover page. Be sure your copy is complete before beginning your
More informationLe Chatelier's principle
Le Chatelier's principle Any factor that can affect the rate of either the forward or reverse reaction relative to the other can potentially affect the equilibrium position. The following factors can change
More informationIn a forward reaction, the reactants collide to produce products and it goes from left to
Worksheet #1 Approaching Equilibrium Read unit II your textbook. Answer all of the questions. Do not start the questions until you have completed the reading. Be prepared to discuss your answers next period.
More informationUnit F FR Practice General Equilibrium (pg 1 of 26)
Unit F FR Practice General Equilibrium (pg 1 of 26) 1. Answer the following questions about glucose, C6H12O6, an important biochemical energy source. (a) Write the empirical formula of glucose. In many
More informationEquilibrium Practice Problems page 1
Equilibrium Practice Problems page 1 1988 D NH 4 HS(s) NH 3 (g) + H 2 S(g) ΔHº = +93 kilojoules The equilibrium above is established by placing solid NH 4 HS in an evacuated container at 25ºC. At equilibrium,
More informationRATES & CHEMICAL EQUILIBRIUM Checklist. Exam Questions
RATES & CHEMICAL EQUILIBRIUM Checklist Make sure you can. Explain what reaction rate is and list the factors which affect the rate of chemical reactions Use Collision theory to explain how the various
More informationChemistry 30: Reaction Kinetics. Practice Problems
Name: Period: Chemistry 30: Reaction Kinetics Practice Problems Date: Measuring Reaction Rates 1. A chemist wishes to determine the rate of reaction of zinc with hydrochloric acid. The equation for the
More informationKc is calculated for homogeneous reactions using the concentrations of the reactants and products at equilibrium:
Chemical Equilibrium Dynamic Equilibrium A dynamic equilibrium exists in a closed system when the rate of the forward reaction is equal to the rate of the reverse reaction. When a dynamic equilibrium is
More informationCh 6 Practice Problems
Ch 6 Practice Problems 1. Which of the following statements is true? A) When two opposing processes are proceeding at identical rates, the sstem is at equilibrium. B) Catalsts are an effective means of
More informationName AP Chemistry / / Chapter 5 Collected AP Exam Free Response Questions Answers
Name AP Chemistry / / Chapter 5 Collected AP Exam Free Response Questions 1980 2010 - Answers 1982 - #5 (a) From the standpoint of the kinetic-molecular theory, discuss briefly the properties of gas molecules
More informationChemistry Chapter 16. Reaction Energy
Chemistry Reaction Energy Section 16.1.I Thermochemistry Objectives Define temperature and state the units in which it is measured. Define heat and state its units. Perform specific-heat calculations.
More informationFormulate an operational definition of reaction rate. Include: examples of chemical reactions that occur at different rates.
Kinetics 1 UNIT 2: KINETICS OUTCOMES All important vocabulary is in Italics and bold. Formulate an operational definition of reaction rate. Include: examples of chemical reactions that occur at different
More informationChapter 10 Practice. Name: Multiple Choice Identify the choice that best completes the statement or answers the question.
Name: Score: 0 / 18 points (0%) [3 open ended questions not graded] Chapter 10 Practice Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A sample of gas
More informationThe reactions we have dealt with so far in chemistry are considered irreversible.
1. Equilibrium Students: model static and dynamic equilibrium and analyse the differences between open and closed systems investigate the relationship between collision theory and reaction rate in order
More informationChemical Equilibrium
Chemical Equilibrium Concept of Equilibrium Equilibrium Constant Equilibrium expressions Applications of equilibrium constants Le Chatelier s Principle The Concept of Equilibrium The decomposition of N
More informationSaturday Study Session 1 3 rd Class Student Handout Thermochemistry
Saturday Study Session 1 3 rd Class Student Handout Thermochemistry Multiple Choice Identify the choice that best completes the statement or answers the question. 1. C 2 H 4 (g) + 3 O 2 (g) 2 CO 2 (g)
More information1 Iodine reacts with chlorine to form dark brown iodine monochloride. I 2 + Cl 2 2ICl
1 Iodine reacts with chlorine to form dark brown iodine monochloride. I 2 + Cl 2 2ICl This reacts with more chlorine to give yellow iodine trichloride. An equilibrium forms between these iodine chlorides.
More information3 Chemical Equilibrium
Aubrey High School AP Chemistry 3 Chemical Equilibrium Name Period Date / / 3.1 Problems Chemical Analysis 1. Write the equilibrium constant expressions for the following reactions. How are they related
More informationEquilibrium. Why? Model 1 A Reversible Reaction. At what point is a reversible reaction completed?
Why? Equilibrium At what point is a reversible reaction completed? Most of the reactions that we have studied this year have been forward reactions once the reactant has changed into the product it stays
More information(b) Describe, and explain, what would happen to the position of the NO 2 /N 2 O 4 equilibrium if the following changes are made
1. Nitrogen dioxide, NO 2, and dinitrogen tetroxide, N 2 O 4, take part in the following equilibrium. 2NO 2 (g) N 2 O 4 (g) ΔH = 58 kj mol 1 (a) State le Chatelier s principle. (b) Describe, and explain,
More informationUnit 9 Kinetics SA Review
1. Base your answer to the following question on the information below. The equilibrium equation below is related to the manufacture of a bleaching solution. In this equation, means that chloride ions
More informationEquilibrium & Reaction Rate
Equilibrium & Reaction Rate 1. One of the important reactions in coal gasification is the catalytic methanation reaction: CO(g) + H (g) H O(g) + CH 4 (g) H 06 kj a) Predict the direction in which this
More information1.6 Chemical equilibria and Le Chatelier s principle
1.6 Chemical equilibria and Le Chatelier s principle Reversible reactions: Consider the reaction: Mg(s) + H2SO4(aq) MgSO4(aq) + H2(g) The reaction stops when all of the limiting reagent has been used up.
More informationKinetics & Equilibrium Review Packet. Standard Level. 1. Which quantities in the enthalpy level diagram are altered by the use of a catalyst?
Kinetics & Equilibrium Review Packet Standard Level 1. Which quantities in the enthalpy level diagram are altered by the use of a catalyst? Enthalpy I II III Time A. I and II only B. I and III only C.
More information91166 Demonstrate understanding of chemical reactivity Collated questions on equilibria
(2017:2) 91166 Demonstrate understanding of chemical reactivity Collated questions on equilibria The addition of a small amount of iron to a mixture of nitrogen and hydrogen gases helps to speed up the
More informationA.M. THURSDAY, 14 January hours. Write your name, centre number and candidate number in the spaces at the top of this page.
Candidate Name Centre Number 2 Candidate Number GCE AS/A level 1091/01 CHEMISTRY CH1 A.M. THURSDAY, 14 January 2010 1 1 2 hours FOR EXAMINER S USE ONLY Section A Question 1-6 Mark ADDITIONAL MATERIALS
More informationDate: Hybrid Chemistry Regents Prep Ms. Hart/Mr. Kuhnau
Name: Period: Date: Hybrid Chemistry Regents Prep Ms. Hart/Mr. Kuhnau UNIT 5: Kinetics and Equilibrium Lesson 1: Collision theory and potential energy diagrams By the end of today, you will have an answer
More informationChapter 10 Homework Answers
Chapter 10 Homework Answers 10-5 The ratio of the equilibrium concentrations of trans--butene to cis--butene at 400 C is 1.7 according to the data in section 10.. This ratio will always have this value
More information1.0 L container NO 2 = 0.12 mole. time
CHEM 1105 GAS EQUILIBRIA 1. Equilibrium Reactions - a Dynamic Equilibrium Initial amounts: = mole = 0 mole 1.0 L container = 0.12 mole moles = 0.04 mole 0 time (a) 2 In a 1.0 L container was placed 4.00
More information3. Indicate the mass action expression for the following reaction: 2X(g) + Y(g) 3W(g) + V(g) a) [X] 2 [Y][W] 3 [V] [W] 3 [V] [X] 2 [Y] [3W][V] [2X][Y]
1. Which of the following statements concerning equilibrium is not true? a) A system that is disturbed from an equilibrium condition responds in a manner to restore equilibrium. b) Equilibrium in molecular
More informationCHEMISTRY a UNIVERSITY ENTRANCE EXAMINATION. Duration : 2 hours. Please read the following instructions carefully.
UNIVERSITY ENTRANCE EXAMINATION CHEMISTRY a Duration : 2 hours Please read the following instructions carefully 1 This paper has THREE (3) sections A, B and C, and comprises FIVE (5) printed pages 2 Attempt
More informationBCIT Fall Chem Exam #2
BCIT Fall 2017 Chem 3310 Exam #2 Name: Attempt all questions in this exam. Read each question carefully and give a complete answer in the space provided. Part marks given for wrong answers with partially
More information(ii) Compare the movement and arrangement of the molecules in solid nitrogen to those in nitrogen gas.
1 Kinetic theory explains the properties of matter in terms of the arrangement and movement of particles. (a) Nitrogen is a gas at room temperature. Nitrogen molecules, N 2, are spread far apart and move
More informationChemical Equilibrium Practice Problems #2
Chemical Equilibrium Practice Problems #2 2-20-2015 1. A CPHS student does an equilibrium experiment with the general chemical equation and derives the 2 graphs below: A = B: a. When at equilibrium is
More informationa) Write the expression for the equilibrium constant, K eq
Chemistry 12 K eq Calculations Worksheet Name: Date: Block: 1. Given the equilibrium equation below: A 2(g) + B 2(g) 2AB (g) If, at equilibrium, the concentrations are as follows: [A 2] = 3.45 M, [B 2]
More informationThe Advanced Placement Examination in Chemistry. Part II - Free Response Questions & Answers 1970 to Equilibrium
The Advanced Placement Examination in Chemistry Part II - Free Response Questions & Answers 1970 to 005 Equilibrium Teachers may reproduce this publication, in whole or in part, in limited print quantities
More informationLE CHATELIER S PRINCIPLE
LE CHATELIER S PRINCIPLE When a chemical system at equilibrium is subjected to an external stress (disturbed by a change in a property), the system establishes a new equilibrium to minimize the effects
More informationName AP CHEM / / Collected AP Exam Essay Answers for Chapter 16
Name AP CHEM / / Collected AP Exam Essay Answers for Chapter 16 1980 - #7 (a) State the physical significance of entropy. Entropy (S) is a measure of randomness or disorder in a system. (b) From each of
More informationAssessment Schedule 2016 Chemistry: Demonstrate understanding of chemical reactivity (91166)
NCEA Level 2 Chemistry (91166) 2016 page 1 of 6 Assessment Schedule 2016 Chemistry: Demonstrate understanding of chemical reactivity (91166) Evidence Statement Q Evidence Achievement Merit Excellence ONE
More informationUNIT ONE BOOKLET 6. Thermodynamic
DUNCANRIG SECONDARY ADVANCED HIGHER CHEMISTRY UNIT ONE BOOKLET 6 Thermodynamic Can we predict if a reaction will occur? What determines whether a reaction will be feasible or not? This is a question that
More information3 A (aq) + 2 D (aq) + 5 C (s) <==> 3 B (aq) + 4 E (aq) + 2 G (ppt)
AP Chemistry Test (Chapter 13) Multiple Choice (30%) 1) Which one best describes the K C for this reaction? 3 A (aq) + 2 D (aq) + 5 C (s) 3 B (aq) + 4 E (aq) + 2 G (ppt) A) K c = [A] 3 [D] 2 B) K
More informationChemistry 40S Chemical Equilibrium (This unit has been adapted from
Chemistry 40S Chemical Equilibrium (This unit has been adapted from https://bblearn.merlin.mb.ca) Name: 1 2 Lesson 1: Defining Equilibrium Goals: Describe physical and chemical equilibrium. Describe the
More informationName Practice Questions Date Kinetics
Name Practice Questions Date Kinetics 1. An experiment was conducted to determine the rate law of the reaction 2 A + 2 B C + D. The data collected is shown below. Base your answers to questions 8 and 9
More information2) C 2 H 2 (g) + 2 H 2 (g) ---> C 2 H 6 (g) Information about the substances
Thermochemistry 1) 2 C 4 H 10 (g) + 13 O 2 (g) ------> 8 CO 2 (g) + 10 H 2 O(l) The reaction represented above is spontaneous at 25 C. Assume that all reactants and products are in their standard states.
More informationKinetics and Equilibrium Extra Credit
1. The potential energy diagram below represents the reaction 2 KClO3 2 KCl + 3 O2. 4. When AgNO3(aq) is mixed with NaCl(aq), a reaction occurs which tends to go to completion and not reach equilibrium
More informationChapter 14: Chemical Kinetics
1. Which one of the following units would not be an acceptable way to express reaction rate? A) M/s B) M min 1 C) L mol 1 s 1 D) mol L 1 s 1 E) mmhg/min 3. For the reaction BrO 3 + 5Br + 6H + 3Br 2 + 3H
More informationName: Regents Review Quiz #1 2016
Name: Regents Review Quiz #1 2016 1. Which two particle diagrams represent mixtures of diatomic elements? A) A and B B) A and C C) B and C D) B and D 2. At STP, which physical property of aluminum always
More informationEntropy, Free Energy, and Equilibrium
Entropy, Free Energy, and Equilibrium Chapter 17 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1 Spontaneous Physical and Chemical Processes A waterfall runs
More informationCHEMISTRY 102 FALL 2010 EXAM 2 FORM C SECTION 502 DR. KEENEY-KENNICUTT PART 1
NAME CHEMISTRY 102 FALL 2010 EXAM 2 FORM C SECTION 502 DR. KEENEY-KENNICUTT Directions: (1) Put your name on PART 1 and your name and signature on PART 2 of the exam where indicated. (2) Sign the Aggie
More informationREACTION EQUILIBRIUM
REACTION EQUILIBRIUM A. REVERSIBLE REACTIONS 1. In most spontaneous reactions the formation of products is greatly favoured over the reactants and the reaction proceeds to completion (one direction). In
More information1. Describe the changes in reactant and product concentration as equilibrium is approached.
Web Review 1. Describe the changes in reactant and product concentration as equilibrium is approached. 2. Describe the changes in the forward and the reverse rates as equilibrium is approached. 3. State
More information3.2.1 Energetics. Enthalpy Change. 263 minutes. 259 marks. Page 1 of 41
..1 Energetics Enthalpy Change 6 minutes 59 marks Page 1 of 41 Q1. (a) Define the term standard molar enthalpy of formation, ΔH f. (b) State Hess s law. (c) Propanone, CO, burns in oxygen as shown by the
More information10.02 PE Diagrams. 1. Given the equation and potential energy diagram representing a reaction:
10.02 PE Diagrams 1. Given the equation and potential energy diagram representing a reaction: 3. Given the potential energy diagram and equation representing the reaction between substances A and D : If
More informationQuiz I: Thermodynamics
Quiz I: Thermodynamics SCH4U_2018-2019_V2 NAME: (Total Score: / 30) Multiple Choice (12) 1. What can be deduced from the following reaction profile? A. The reactants are less stable than the products and
More informationAP Chemistry Big Idea Review
Name: AP Chemistry Big Idea Review Background The AP Chemistry curriculum is based on 6 Big Ideas and many Learning Objectives associated with each Big Idea. This review will cover all of the Big Ideas
More informationProblem Set. Assigned October 18, 2013 Due Friday, October 25, Please show all work for credit
Problem Set Assigned October 18, 2013 Due Friday, October 25, 2013 Please show all work for credit To hand in: Thermodynamic Relations 1. The shells of marine organisms contain CaCO 3 largely in the crystalline
More informationAP Chemistry Review Packet # form B. How many grams of water are present in 1.00 mol of copper(ii) sulfate pentahydrate?
AP Chemistry Review Packet #4 Warmup: Reaction Prediction 2010 form B (a) Solid copper(ii) sulfate pentahydrate is gently heated. How many grams of water are present in 1.00 mol of copper(ii) sulfate pentahydrate?
More informationChemical Equilibrium. Professor Bice Martincigh. Equilibrium
Chemical Equilibrium by Professor Bice Martincigh Equilibrium involves reversible reactions Some reactions appear to go only in one direction are said to go to completion. indicated by All reactions are
More informationMETRO CENTRAL EDUCATION DISTRICT GRADE 12 PHYSICAL SCIENCES: PAPER 2 (CHEMISTRY) SEPTEMBER 2016
METRO CENTRAL EDUCATION DISTRICT GRADE 12 PHYSICAL SCIENCES: PAPER 2 (CHEMISTRY) SEPTEMBER 2016 MARKS: 150 TIME: 3 hours This question paper consists of 14 numbered pages and 4 data sheets. PHYSICAL SCIENCES/P2
More informationName: Chapter 3: The Nature Of Organic Reactions: Alkenes
Name: Chapter 3: The Nature Of Organic Reactions: Alkenes 1 Vocabulary cis-trans isomerism: E,Z designation: Addition: Elimination: Substitution: Rearrangement: Homolytic: Heterolytic Homogenic: Heterogenic:
More informationThe word equation shows the reaction between anhydrous cobalt chloride and water.
1 The word equation shows the reaction between anhydrous cobalt chloride and water. anhydrous cobalt chloride (blue) + water hydrated cobalt chloride (pink) (a) Name the type of reaction shown by the sign
More informationAP CHEMISTRY 2009 SCORING GUIDELINES
2009 SCORING GUIDELINES Question 1 (10 points) Answer the following questions that relate to the chemistry of halogen oxoacids. (a) Use the information in the table below to answer part (a)(i). Acid HOCl
More informationChemistry 40S Chemical Kinetics (This unit has been adapted from
Chemistry 40S Chemical Kinetics (This unit has been adapted from https://bblearn.merlin.mb.ca) Name: 1 2 Lesson 1: Introduction to Kinetics Goals: Identify variables used to monitor reaction rate. Formulate
More informationAS Paper 1 and 2 Kc and Equilibria
AS Paper 1 and 2 Kc and Equilibria Q1.When one mole of ammonia is heated to a given temperature, 50 per cent of the compound dissociates and the following equilibrium is established. NH 3(g) ½ N 2 (g)
More informationN Goalby chemrevise.org
4.6 Rate and Extent of Chemical Change Rates of Reaction The rate of a chemical reaction can be found by measuring the amount of a reactant used or the amount of product formed over time: Rate of reaction
More informationCalculations Involving the Equilibrium Constant K eq )
Calculations Involving the Equilibrium Constant K eq ) 1. Given the equilibrium equation below: A 2(g) + B 2(g) 2AB (g) If, at equilibrium, the concentrations are as follows: [A 2 ] = 3.45 M, [B 2 ] =
More information3 A (aq) + 2 D (aq) 4 C (g) + B (s) + 2 E (l)
AP Chemistry Test (Chapter 13) Multiple Choice (20%) 1) Which one best describes the K C for this reaction? 3 A (aq) + 2 D (aq) 4 C (g) + B (s) + 2 E (l) A) K c = [A] 3 [D] 2 B) K c = [C] 4 [B][E] 2 [C]
More informationEquilibrium Written Response
Equilibrium Written Response January 1998 2. Consider the following equilibrium: CS2 (g) + 3Cl2 (g) CCl4 (g) + S2Cl2 (g) ΔH = -238 kj a) Sketch a potential energy diagram for the reaction above and label
More informationThermodynamics Review 2014 Worth 10% of Exam Score
Thermodynamics Review 2014 Worth 10% of Exam Score Name: Period: 1. Base your answer to the following question on the diagram shown below. 4. The heat of combustion for is kcal. What is the heat of formation
More informationWork hard. Be nice. Name: Period: Date:
Name: Period: Date: KIPP NYC College Prep General Chemistry UNIT 8: Kinetics and Equilibrium Lesson 3: Potential Energy Diagrams By the end of today, you will have an answer to: How do we extract information
More informationUNIT II - REVIEW EQUILIBRIA. Part I - Multiple Choice. 1. In which of the following does the entropy decrease?
CHEMISTRY 12 UNIT II - REVIEW EQUILIBRIA Part I - Multiple Choice 1. In which of the following does the entropy decrease? A. NaCl (s) Na + (aq) + Cl (aq) B. 4 NO (g) + 6 H 2 O (g) 4 NH 3 (g) + 5 O 2 (g)
More informationb. Free energy changes provide a good indication of which reactions are favorable and fast, as well as those that are unfavorable and slow.
Chem 130 Name Exam 3, Ch 7, 19, 14 November 9, 2018 100 Points Please follow the instructions for each section of the exam. Show your work on all mathematical problems. Provide answers with the correct
More informationGibbs Free Energy. Evaluating spontaneity
Gibbs Free Energy Evaluating spontaneity Predicting Spontaneity An increase in entropy; Changing from a more structured to less structured physical state: Solid to liquid Liquid to gas Increase in temperature
More information1. The reaction between solid barium hydroxide and solid ammonium chloride can be represented by the equation below.
1. The reaction between solid barium hydroxide and solid ammonium chloride can be represented by the equation below. Ba(OH) 2 (s) + 2NH 4 Cl(s) BaCl 2 (s) + 2NH 3 (g) + 2H 2 O(l) ΔH ο = +51.1 kj mol 1
More information