Question

The energy of activation of a forward reaction is 50 Kcal. The energy of activation of its backward reaction is:-

• A. Equal to 50 Kcal.
• B. Greater than 50 Kcal.
• C. Less than 50 Kcal.
• D. Either greater or less than 50 Kcal.

Answer 1

The correct option is D Either greater or less than 50 Kcal.

As we know, heat of the reaction $=\Delta H=E_f-E_b$

$E_b=E_f-\Delta H$

So, the energy of activation for its backward reaction depends upon heat of reaction and it can be greater or less than $50$ Kcal.