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Constructed Response
. Topic 9 : Kinetic and Equilibrium

Set G: Potential energy diagram, heat of reaction, effect of catalyst

Base your answers to questions 14 through 17 on the potential energy diagram and the equation

below.

B

A

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2 C(s) + H2(g) + 227.4 KJ -------- > C2H2(g)

14. Describe how the potential energy diagram 14.

will change if a catalyst is added.

15. If 682.2 Kilojoules are absorbed, how many 15.
moles of C2H2 (g) are produced.

16. The letter B represents which chemical formula 16.

or formulas in the equation?

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17. What is the sign for the heat of reaction, ∆H ? 17

Set H: Potential energy diagram, effect of catalyst

Base your answer to questions 18 through 20 on the potential energy diagram below.

18. Explain, in terms of the function of catalyst, 18.

why the curves on the potential energy

diagram for the catalyzed and uncatalyzed

reactions are different.

19. What is the activation energy for the 19.

forward reaction with the catalyst?

20. What is the heat of reaction for the reverse 20.

reaction without catalyst?
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