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Topic 9 – Kinetics and Equilibrium

11. Continues

Answers questions 8 through 10 on the potential energy diagram below.

E

F

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8. Which potential energy measurements will change if a catalyst is added to the reaction?

1) A, B, and C 2) A, B, and E 3) B, C, and D 4) A, B, and D

9. Which arrow represents the difference between the potential energy of the products and that of the

reactants?
1) A 2) B 3) D 4) E

10. Potential energy of reactants for the reverse reaction can be determined by the length of arrow
3) C
1) A

4) E

2) B

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Base your answers to questions 11 and 12 on the potential energy diagram below

Uncatalyzed reaction curve
Potential Energy (KJ) Catalyzed reaction curve

11. Which statement correctly describes the potential energy changes that occur in the forward

uncatalyzed reaction?
1) The activation energy is 40 KJ and a ∆H of + 20 KJ
2) The activation energy is 40 KJ and a ∆H of -20 kJ
3) The activation energy is 60 KJ and a ∆H of +20 KJ
4) The activation energy is 60 KJ and a ∆H of -20 KJ

12. Which reaction requires the lowest amount 13. What is the heat of reaction (∆H)

of activation energy? for the reverse catalyzed reaction?
1) Forward uncatalyzed reaction 1) + 20 KJ
2) – 20KJ
2) Forward catalyzed reaction 3) + 40 KJ
3) Reverse uncatalyzed reaction
4) Reverse catalyzed reaction 4) – 40 KJ
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