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Unit 13 Review Kinetics & Equilibrium. 1. Energy that is available to do work is called ____. A. Exothermic energy B. Endothermic energy C. Gibbs Free.

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Presentation on theme: "Unit 13 Review Kinetics & Equilibrium. 1. Energy that is available to do work is called ____. A. Exothermic energy B. Endothermic energy C. Gibbs Free."— Presentation transcript:

1 Unit 13 Review Kinetics & Equilibrium

2 1. Energy that is available to do work is called ____. A. Exothermic energy B. Endothermic energy C. Gibbs Free Energy D. Heat

3 2. ____ is defined as the number of atoms, ions, or molecules that react in a given time to form products. A. Reaction Rate B. Concentration C. Time D. Spontaneous Reaction

4 3. What is the name of the minimum energy that colliding particles must have in order to react? A. Activated complex B. Activation energy C. Progress of reaction D. Gibbs Free Energy

5 4. What is the arrangement of atoms at the peak of an energy barrier? A. Activated complex B. Activation energy C. Reactant D. Product

6 5. At equilibrium, what is the rate of production of reactants compared with the rate of production of products? A. Higher B. Lower C. The same D. Not enough information

7 6. The rate of a chemical reaction normally ____ as reactant concentration increases. A. Increases B. Decreases C. Stays the same D. Not enough information

8 7. The amount of disorder in a system is measured by its ____. A. Enthalpy B. Entropy C. Heat change D. Gibbs Free Energy

9 8. If a reaction has an equilibrium constant (K eq ) just greater than 1, how do we interpret that information? A. Reactants are favored B. Products are favored C. Both reactant and product are favored D. Neither reactant or product are favored

10 9. Which variable is NOT required to calculate the Gibbs free-energy change for a chemical reaction? A. Change in enthalpy B. Change in entropy C. Temperature in o C D. Temperature in K

11 10. What is the effect of adding more water to the following equilibrium reaction: CO 2 + H 2 O H 2 CO 3 A. Concentration of H 2 CO 3 decreases B. Concentration of H 2 CO 3 increases C. Concentration of CO 2 increases D. Concentration of H 2 O decreases

12 11. In an endothermic reaction at equilibrium, what is the effect of raising the temperature? A. Shift to the reactants B. Shift to the products C. No effect D. Not enough information

13 12. What is the numerical value (+ or -) of Gibbs free- energy change for a spontaneous reaction? A. G is positive B. G is negative

14 13. At what stage of a reaction do atoms have the highest energy? A. As reactants B. As products C. At the transition stage (activated complex) D. They dont have energy

15 14. Which of the following systems has the highest entropy: A. 10 mL of HCl at 50 o C B. 10 mL of HCl at 100 o C C. 10 mL of HCl at 75 o C D. 10 mL of HCl at 10 o C

16 15. An elementary reaction converts reactants to products in ____. A. A single step B. In multiple steps

17 16. Consider the reaction: N 2(g) + 3H 2(g) 2NH 3(g) What is the effect of decreasing the volume on the contained gases? A. Concentration of NH 3 increases B. Concentration of N 2 increases C.Concentration of H 2 decreases D. Both A and C

18 17. Spontaneous reactions always ____ free energy. A. Release B. Absorb C. Contain D. All of the above

19 18. What physical state of nitrogen has the highest entropy? A. Solid B. Liquid C. Gas D. All the same

20 19. What is another name for the catalysts in your body? A. Inhibitor B. DNA C. Enzyme D. RNA

21 20. In an equilibrium reaction with a K eq of 1 x 10 8, the ____ are favored. A. Reactants B. Products C. Both reactants and products D. Neither reactants or products

22 21. In which of these systems is the entropy decreasing: A. Salt dissolving in water B. A liquid cooling C. Heating a liquid D. Breaking apart a sugar cube

23 22. In a two-step reaction mechanism, how many elementary reactions occur? A. 0 B. 1 C. 2 D. 3

24 23. The K eq of a reaction is 4 x At equilibrium, the ____ are favored. A. reactants B. products C. Both reactants and products D. Neither reactants or products

25 24. Another name for the activated complex is ____. A. Activation energy B. reactant C. product D. Transition state

26 25. A catalyst works by ____. A. Increasing the amount of energy you need. B. Decreasing the activation energy. C. Acting as an inhibitor. D. None of the above.

27 Answers 1.C9. C17. A 2.A10. B18. C 3.B11. B19. C 4.A12. B20. B 5.C13. C21. B 6.A14. B22. C 7.B15. A23. A 8.B16. D24. D 25. B


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