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N2(g) + 3H2(g) iff 2NH,(g) + 22 kcal Th...

`N_2(g) + 3H_2(g) iff 2NH,(g)` + 22 kcal
The activation energy for the forward reaction is 50 kcal. What is the activation energy for the backward reaction ?

A

72 kcal

B

28 kcal

C

-72 kcal

D

-28 kcal

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The correct Answer is:
A
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