The following energy profiles for four different reactions are shown. Which reac

Question

The following energy profiles for four different reactions are shown. Which reaction is the most exothermic? a b c d The mechanism for the reaction 2H_2O_2(aq) rightarrow 2H_2O(b) + O_2(g) in the presence of 1^-(aq) is proposed to be Step 1: H_2O_2(aq) + 1^+ (aq) rightarrow H_2O(b) + O1^+ (aq) (slow) Step 2: H_2O_2(aq) + O1^-(aq) rightarrow H_2O(b) + O_2(g) + 1^+(aq)(fast) What is the rate law for the overall reaction? Rate = k[H_2O_2] Rate = k[H_2O_2]^2 Rate = k[H_2O_2][1^-] Rate = k[H_2O_2][O1^-] Rate = k[H_2_O_2]^2[1^-]/[H_2O]

Explanation / Answer

23. exothermic means the energy is released during the reaction. it is possible only when energy of reactant is higher than products.

so that , both a and c is exothermic among this a is more exothermic.

answer: a

24. rate of the reaction depends on slow step.

rate = k[H2O2][I-]

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