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

• A

  $\Delta S=0$
• B

  $\Delta G=0$
• Correct answer
  C

  $\Delta H=0$
• D

  $\Delta H=\Delta G=\Delta S=0$

Solution

Energy profile diagram for a reaction is as From the figure, it is clear that
So, \(\left(E_2\right)_b=\left(E_2\right)_f+\Delta H\left(\right.\) as, \(\left(E_2\right)_b=\left(E_2\right)_f\) So, \(\Delta H=0\). [Here $\left(E_2\right)_b=$ activation energy of backward reaction and $\left(E_2\right)_f=$ activation energy of forward reaction].

Hence, the correct answer is option: 'C'.