Chapter 17 Preview Multiple Choice Short Answer Extended Response Standardized Test Preparation Chapter 17 Preview Multiple Choice Short Answer Extended Response

Chapter 17 Multiple Choice Standardized Test Preparation Chapter 17 Multiple Choice 1. The sequence of steps that occurs in a reaction process is called the A. order of the reaction. B. rate law. C. overall reaction. D. reaction mechanism.

Chapter 17 Multiple Choice Standardized Test Preparation Chapter 17 Multiple Choice 1. The sequence of steps that occurs in a reaction process is called the A. order of the reaction. B. rate law. C. overall reaction. D. reaction mechanism.

Chapter 17 Multiple Choice 2. To be effective, a collision requires Standardized Test Preparation Chapter 17 Multiple Choice 2. To be effective, a collision requires A. enough energy only. B. favorable orientation only. C. enough energy and a favorable orientation. D. a reaction mechanism.

Chapter 17 Multiple Choice 2. To be effective, a collision requires Standardized Test Preparation Chapter 17 Multiple Choice 2. To be effective, a collision requires A. enough energy only. B. favorable orientation only. C. enough energy and a favorable orientation. D. a reaction mechanism.

Chapter 17 Multiple Choice Standardized Test Preparation Chapter 17 Multiple Choice 3. How does the energy of the activated complex compare with the energies of the reactants and products? A. It is lower than both the energy of the reactants and the energy of the products. B. It is lower than the energy of the reactants but higher than the energy of the products. C. It is higher than the energy of the reactants but lower than the energy of the products. D. It is higher than both the energy of the reactants and the energy of the products.

Chapter 17 Multiple Choice Standardized Test Preparation Chapter 17 Multiple Choice 3. How does the energy of the activated complex compare with the energies of the reactants and products? A. It is lower than both the energy of the reactants and the energy of the products. B. It is lower than the energy of the reactants but higher than the energy of the products. C. It is higher than the energy of the reactants but lower than the energy of the products. D. It is higher than both the energy of the reactants and the energy of the products.

Chapter 17 Multiple Choice Standardized Test Preparation Chapter 17 Multiple Choice 4. If a collision between molecules is very gentle, the molecules are A. more likely to be oriented favorably. B. less likely to be oriented favorably. C. likely to react. D. likely to rebound without reacting.

Chapter 17 Multiple Choice Standardized Test Preparation Chapter 17 Multiple Choice 4. If a collision between molecules is very gentle, the molecules are A. more likely to be oriented favorably. B. less likely to be oriented favorably. C. likely to react. D. likely to rebound without reacting.

Chapter 17 Multiple Choice Standardized Test Preparation Chapter 17 Multiple Choice 5. A species that changes the rate of a reaction but is neither consumed nor changed is A. a catalyst. B. an activated complex. C. an intermediate. D. a reactant.

Chapter 17 Multiple Choice Standardized Test Preparation Chapter 17 Multiple Choice 5. A species that changes the rate of a reaction but is neither consumed nor changed is A. a catalyst. B. an activated complex. C. an intermediate. D a reactant.

Chapter 17 Multiple Choice 6. A rate law relates Standardized Test Preparation Chapter 17 Multiple Choice 6. A rate law relates A. reaction rate and temperature. B. reaction rate and concentration. C. temperature and concentration. D. energy and concentration.

Chapter 17 Multiple Choice 6. A rate law relates Standardized Test Preparation Chapter 17 Multiple Choice 6. A rate law relates A. reaction rate and temperature. B. reaction rate and concentration. C. temperature and concentration. D. energy and concentration.

Chapter 17 Multiple Choice Standardized Test Preparation Chapter 17 Multiple Choice 7. In a graph of how energy changes with reaction progress, the activated complex appears at the A. left end of the curve. B. right end of the curve. C. bottom of the curve. D. peak of the curve.

Chapter 17 Multiple Choice Standardized Test Preparation Chapter 17 Multiple Choice 7. In a graph of how energy changes with reaction progress, the activated complex appears at the A. left end of the curve. B. right end of the curve. C. bottom of the curve. D. peak of the curve.

Chapter 17 Multiple Choice Standardized Test Preparation Chapter 17 Multiple Choice 8. The slowest step in a mechanism is called A. the rate-determining step. B. the uncatalyzed reaction. C. the activation step. D. None of the above

Chapter 17 Multiple Choice Standardized Test Preparation Chapter 17 Multiple Choice 8. The slowest step in a mechanism is called A. the rate-determining step. B. the uncatalyzed reaction. C. the activation step. D. None of the above

Chapter 17 Multiple Choice Standardized Test Preparation Chapter 17 Multiple Choice 9. A certain reaction is zero order in reactant A and second order in reactant B. What happens to the reaction rate when the concentrations of both reactants are doubled? A. The reaction rate remains the same. B. The reaction increases by a factor of two. C. The reaction rate increases by a factor of four. D. The reaction rate increases by a factor of eight.

Chapter 17 Multiple Choice Standardized Test Preparation Chapter 17 Multiple Choice 9. A certain reaction is zero order in reactant A and second order in reactant B. What happens to the reaction rate when the concentrations of both reactants are doubled? A. The reaction rate remains the same. B. The reaction increases by a factor of two. C. The reaction rate increases by a factor of four. D. The reaction rate increases by a factor of eight.

Standardized Test Preparation Chapter 17 Short Answer 10. Two molecules collide but bounce apart unchanged. What two reasons could account for their failure to react?

Standardized Test Preparation Chapter 17 Short Answer 10. Two molecules collide but bounce apart unchanged. What two reasons could account for their failure to react? Answer: They had insufficient energy for bonds to break, or they did not collide in a favorable orientation.

Standardized Test Preparation Chapter 17 Short Answer 11. Sketch a diagram that shows how the energy changes with the progress of an endothermic reaction. Label the curve “Reactants,” “Products,” and “Activated complex.” On the same diagram, sketch a second curve to show the change caused by a catalyst.

Standardized Test Preparation Chapter 17 Short Answer 11. Sketch a diagram that shows how the energy changes with the progress of an endothermic reaction. Label the curve “Reactants,” “Products,” and “Activated complex.” On the same diagram, sketch a second curve to show the change caused by a catalyst. Answer: The humped curve should have a final plateau that is higher than its initial plateau. The second curve should share the same plateaus as the first but should have a lower hump.

Chapter 17 Extended Response Standardized Test Preparation Chapter 17 Extended Response 12. Suggest ways of measuring the concentration of a reactant or product in a reaction mixture.

Chapter 17 Extended Response Standardized Test Preparation Chapter 17 Extended Response 12. Suggest ways of measuring the concentration of a reactant or product in a reaction mixture. Answer: Answers may vary. Among the methods that might be suggested are by observing a change in color intensity, by removing samples and analyzing for one component, and by measuring pressure change.

Chapter 17 Extended Response Standardized Test Preparation Chapter 17 Extended Response 13. Why are reaction orders not always equal to the coefficients in a balanced chemical equation?

Chapter 17 Extended Response Standardized Test Preparation Chapter 17 Extended Response 13. Why are reaction orders not always equal to the coefficients in a balanced chemical equation? Answer: Reactions often occur by a multi-step mechanism. Reaction orders reflect the coefficients in the rate-determining step of such a mechanism, not the coefficients in the overall equation.