Problem: The reaction rates of many spontaneous reactions are actually very slow. Which of these statements is the best explanation for this observation? A) Kp for the reaction is less than one. B) The activation energy of the reaction is large. C) ΔG° for the reaction is positive. D) Such reactions are endothermic. E) The entropy change is negative. 

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The reaction rates of many spontaneous reactions are actually very slow. Which of these statements is the best explanation for this observation?

A) Kp for the reaction is less than one.

B) The activation energy of the reaction is large.

C) ΔG° for the reaction is positive.

D) Such reactions are endothermic.

E) The entropy change is negative. 

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