Homework Help is Here – Start Your Trial Now!
Science
Chemistry
16. Use the diagram to answer these questions. 75 50 Produc Resctanti Reaction progress- a) Is the reaction exothermic or endothermic? b) Determine the approximate value of AE for the forward reaction. Scanned with CamScanner quiibrhum Cal E Energy (k/mol)

16. Use the diagram to answer these questions. 75 50 Produc Resctanti Reaction progress- a) Is the reaction exothermic or endothermic? b) Determine the approximate value of AE for the forward reaction. Scanned with CamScanner quiibrhum Cal E Energy (k/mol)

Introductory Chemistry: A Foundation
Introductory Chemistry: A Foundation
9th Edition
ISBN:9781337399425
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Donald J. DeCoste
Chapter17: Equilibrium
Section: Chapter Questions
Problem 9CR
See similar textbooks
icon
Related questions
Question
16. Use the diagram to answer these questions. 75 50 25 -25 Reaction progress a) Is the reaction exothermic or endothermic? b) Determine the approximate value of AE for the forward reaction. Scanned with CamScanner nemical phum c) What is the activation energy in each direction? d) A catalyst is found that lowers the activation energy of the reaction by about 10 kl/mol. How will this catalyst affect ihe rate of the reverse reaction? 17. Which of these statements is (are) truel If a statement is false, reword it so that it becomes true. a) The concentration of a homogeneous catalyst may appear In the rate law. b) A catalyst is always consumed in the reaction. 18. Which of these reactions appear to involve a catalyst? In those cases where a catalyst is present, tell whether it is homogenevus or heterogeneous. a) CH,COOCH,(aq) + H;O(() --- CH,COOH(aq) + CH,OH(aq) Rate A[CH,COOCH J[H,0'| b) H;(g) + 1:(g) - 2 HI(g) Rate = k(H:1:1 19. Why are homogeneous catalysts harder to sepårate from products and leftover reactants than are heterogeneous reactants? 20. The graph shows the change in concentration as a function of time for the reaction 2 H,O;(g) - 2 H,O(g) + O;(g) Time What do each of the curves A, B, and C represent?
Transcribed Image Text:16. Use the diagram to answer these questions. 75 50 25 -25 Reaction progress a) Is the reaction exothermic or endothermic? b) Determine the approximate value of AE for the forward reaction. Scanned with CamScanner nemical phum c) What is the activation energy in each direction? d) A catalyst is found that lowers the activation energy of the reaction by about 10 kl/mol. How will this catalyst affect ihe rate of the reverse reaction? 17. Which of these statements is (are) truel If a statement is false, reword it so that it becomes true. a) The concentration of a homogeneous catalyst may appear In the rate law. b) A catalyst is always consumed in the reaction. 18. Which of these reactions appear to involve a catalyst? In those cases where a catalyst is present, tell whether it is homogenevus or heterogeneous. a) CH,COOCH,(aq) + H;O(() --- CH,COOH(aq) + CH,OH(aq) Rate A[CH,COOCH J[H,0'| b) H;(g) + 1:(g) - 2 HI(g) Rate = k(H:1:1 19. Why are homogeneous catalysts harder to sepårate from products and leftover reactants than are heterogeneous reactants? 20. The graph shows the change in concentration as a function of time for the reaction 2 H,O;(g) - 2 H,O(g) + O;(g) Time What do each of the curves A, B, and C represent?
24. A rule of thumb is that for a typical reaction, if concentratlons are uncangeu,a ToKe in temperature increases th eaction rale by two to four times. Use an average increase of three times to answer the questions below. 8:37 M * ll ll 69% Scanned with CamScanner 21. Platinum metal is used as a catalyst in the decomposition of NOte) into N.(e) and 0,(g). A graph of the rate of the reaction as a function of NO concentration is shown below. (NO] Explain why the rate stops increasing and levels out. 22. The decomposition of N,0, is first-order with a rate constant of 2.5 x 10-s. a) What is the half-life for decomposition of N,O,? b) How lang does it take for the concentration of N,O, to drop to + of its original value? c) How long does it take for the concentration of N,O, to drop from 3.4 x 10- mol/L to 2.3 x 10- mol/L? 23. The rate constant for decomposition of azomethane at 425°C is 0.68 s CH,N=NCH,(g) N,(g) + C,H,(g) a) Based on the units of the rate constant, is the reaction zeroth-, first-, or second-order? b) If 2.0 g azomethane is placed in a 2.0-L flask and heated to 425°C, what mass of azomethane remains after 5.0 s? c) How long does it take for the mass of azomethane to drop to 0.24 g? d) What mass of nitrogen would be found in the flask after 0.50 s of reaction? Scanned with CamScanner Page 43 44 a) What is the approximate artivation +
Transcribed Image Text:24. A rule of thumb is that for a typical reaction, if concentratlons are uncangeu,a ToKe in temperature increases th eaction rale by two to four times. Use an average increase of three times to answer the questions below. 8:37 M * ll ll 69% Scanned with CamScanner 21. Platinum metal is used as a catalyst in the decomposition of NOte) into N.(e) and 0,(g). A graph of the rate of the reaction as a function of NO concentration is shown below. (NO] Explain why the rate stops increasing and levels out. 22. The decomposition of N,0, is first-order with a rate constant of 2.5 x 10-s. a) What is the half-life for decomposition of N,O,? b) How lang does it take for the concentration of N,O, to drop to + of its original value? c) How long does it take for the concentration of N,O, to drop from 3.4 x 10- mol/L to 2.3 x 10- mol/L? 23. The rate constant for decomposition of azomethane at 425°C is 0.68 s CH,N=NCH,(g) N,(g) + C,H,(g) a) Based on the units of the rate constant, is the reaction zeroth-, first-, or second-order? b) If 2.0 g azomethane is placed in a 2.0-L flask and heated to 425°C, what mass of azomethane remains after 5.0 s? c) How long does it take for the mass of azomethane to drop to 0.24 g? d) What mass of nitrogen would be found in the flask after 0.50 s of reaction? Scanned with CamScanner Page 43 44 a) What is the approximate artivation +
Expert Solution
steps

Step by step

Solved in 7 steps with 6 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Chemical Equilibrium
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Introductory Chemistry: A Foundation
Introductory Chemistry: A Foundation
Chemistry
ISBN:
9781337399425
Author:
Steven S. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry: The Molecular Science
Chemistry: The Molecular Science
Chemistry
ISBN:
9781285199047
Author:
John W. Moore, Conrad L. Stanitski
Publisher:
Cengage Learning
Chemistry: Matter and Change
Chemistry: Matter and Change
Chemistry
ISBN:
9780078746376
Author:
Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:
Glencoe/McGraw-Hill School Pub Co
Introductory Chemistry For Today
Introductory Chemistry For Today
Chemistry
ISBN:
9781285644561
Author:
Seager
Publisher:
Cengage
Chemistry for Today: General, Organic, and Bioche…
Chemistry for Today: General, Organic, and Bioche…
Chemistry
ISBN:
9781305960060
Author:
Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Publisher:
Cengage Learning
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
SEE MORE TEXTBOOKS