10-12: Use the following to answer questions 8-10 The questions below refer to t

Question

10-12: Use the following to answer questions 8-10 The questions below refer to the following diagram Reaction progress 10) Why is this reaction considered to be exothermic? A) Because energy difference B is greater than energy difference C B) Because energy difference B is greater than energy difference A C) Because energy difference A is greater than energy difference C D) Because energy difference B is greater than energy difference C plus energy difference A E) Because energy difference A and energy difference C are about equal At what point on the graph is the activated complex present? 11) A) B) C) D) E) point W point X point Y point Z none of these 12) If the reaction were reversible, would the forward or the reverse reaction have a higher activation energy? A) The diagram shows no indication of any activation energy B) The forward and reverse activation energies are equal. C) The forward activation energy would be greater D) The reverse activation energy would be greater E) None of these

Explanation / Answer

1)

Energy of product is less than that of energy of reactant

So, energy must have been released in this process

Hence it is exothermic

Answer: B

2)

Activated complex is the top one

This is Y

Answer: C

3)

for forward reaction, activation energy = A

for forward reaction, activation energy = B

Since B > A, the reverse activation energy is greater

Answer: D

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