question_answer

A reaction having equal energies of activation for forward and reverse reactions has

A)  \[\Delta S=0\]

B)  \[\Delta G=0\]

C)  \[\Delta H=0\]

D)  \[\Delta H=\Delta G=\Delta S=0\]

Correct Answer: C

Solution :

 Energy profile diagram for a reaction is as From the figure, it is clear that \[{{({{E}_{a}})}_{b}}={{({{E}_{a}})}_{f}}+\Delta \Eta \] [Here \[{{({{E}_{a}})}_{b}}=\] activation energy of backward reaction and \[{{({{E}_{a}})}_{f}}=\] activation energy of forward reaction]. If \[{{({{E}_{a}})}_{b}}={{({{E}_{a}})}_{f}}\] then \[\Delta H=0\]