Examine the potential energy diagram below. Use text boxes to respond. B F a. How many steps are represented in this energy diagram? Give a reason for your answer. AM b. For which step does the enthalpy change have the greatest magnitude? Reaction Progress c. The difference between which two letters represents the activation energy for the reverse of step 2?

Examine the potential energy diagram below. Use text boxes to respond. B F a. How many steps are represented in this energy diagram? Give a reason for your answer. AM b. For which step does the enthalpy change have the greatest magnitude? Reaction Progress c. The difference between which two letters represents the activation energy for the reverse of step 2?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Match each label in diagrams 1 and 2 (a-i) with the appropriate description. Each answer choice is used only once OR not at all. ΔH > 0 activation energy product exothermic reaction activated complex 1. a 2. b 3. c 4. d 5. e 6. f 7. g 8. h 9. i
400 300 + energy 200 - (kJ/mol) с +D 100 A + В reaction coordinate Use the energy diagram to answer these questions. I KJ/mol What is the heat of reaction? Exothermic Is the reaction exothermic or endothermic? Endothermic Neither Yes, it's kJ/mol Can you determine the activation energy? No. Can you determine the activation energy of the reverse reaction? Yes, it's kJ/mol С+D- A+B No.
If the activation energy of a reaction increases, what happens to the rate constant (k)? A.the rate constant decreases B.the rate constant stays the same C. there isn't enough information to predict what happens to the rate constant D. the rate constant increases
3. Draw a reaction energy diagram, and label the product (P), reactant (R), transition states (TS1, TS2, etc.), intermediates (INT1, INT2, etc.) and activation energies (AG‡₁, AG 2, etc.) for a reaction with the following criteria: i. A three-step, endothermic reaction; ii. AG3 > 0 but AG₁ AG‡₁ >> AG‡₂. Which species does the structure of the transition state of the rate-determining step resemble?
250 - 200 - E (kJ) Os + NO 150 - 100 - O2 + NO2 50 - Time (seconds) a. Is the reaction endothermic or exothermic? Ans. b. What is the activation energy for the reaction? Ans. c. Assuming that the reaction is reversible, what is the value of the activation energy for the reverse reaction? Ans.
3) Which of the following is NOT true about a catalyst? A.It may be homogeneous B. It speeds up the reverse reaction C. It is consumed D. It speeds up the forward reaction E. it may be heterogeneous
Answer the following question using the reaction coordináte diagram shown below. 280 240 200 160 120- 80 40 Time What is the activation energy for the reverse reaction? O A. -160 kJ B. -80 kJ O C. 80 kJ D. 160 kJ tent (H) kilojoules
Leaming Goal: • Part A To help you understand how to interpret potential energy diagrams. What is the value of the activation energy of the uncatalyzed reaction? The graphs shown here are called potential energy diagrams. They show the potential energy of a system as it changes from reactants to products. The first graph shows the uncatalyzed reaction (Figure 1); the second graph shows the catalyzed reaction (Figure 2). Express your answer to three significant figures and include the appropriate units. > View Available Hint(s) Symbols undo redo teset keyboard shortcuts Help Tempietes activation energy = |175 kJ Submit Prevlous Answere X Incorrect; Try Again; 5 attempts remaining • Part B What is the value of the enthalpy change of the uncatalyzed reaction? Express your answer to three significant figures and include the appropriate units. Figure O 1 of 2 > • View Available Hint(s) Uncatalyzed Reaction Templetes Symbols undo regdo feset keyboard shortcuts help 125 kJ AH = reactants 200…
40. The reaction that produces ammonia is represented by a balanced equation, shown below. A catalyst can be used to increase the rate of the reaction. N2(g) + 3H2(g) → 2NH3(g) + energy A potential energy diagram for the reaction is shown below. C A Reaction Coordinate What occurs when a catalyst is added to a chemical reaction? A. an alternate reaction pathway lowers activation energy, changing the magnitude of both B and C B. new reactants are added which increases their potential energy, changing the magnitude of both A and D C. different products are produced with a lower potential energy, changing the magnitude of both A and B D. the temperature is increased so there are more effective collisions, which changes the magnitude of A and C
Which statement is NOT correct? A. Activation energy is the same in the forward and reverse direction. B. The activated complex will be the highest on the reaction energy diagram. C. If the forward reaction is endothermic, the reverse reaction will be exothermic. D. In an endothermic reaction, the activation energy is usually greater than the change in enthalpy. E. An activated complex has higher energy than any molecule contributing to it.