Question

In a hypothetical reaction, $A\to Y$, the activation energies for the forward and backward reactions are $15$ and $9$ $kJ$ ${mol}^{-1}$ respectively. The potential energy of $A$ is $10$ $kJ$ ${mol}^{-1}$. Which of the following is wrong?

• A. Threshold energy of the reaction is $25$ $kJ$
• B. The potential energy of $B$ is $16$ $kJ$
• C. Heat of reaction is $6$ $kJ$
• D. The reaction is exothermic

Answer 1

The correct option is D The reaction is exothermic

Since $E_{forward}>E_{backward}$ thus the reaction must be endothermic.