Question

Consider an endothermic reaction $X \rightarrow Y$ with the activation energies $E_{b}$ and $E_{f}$ for the backward and forward reactions, respectively. In general

• A. $E_{b}<\,E_{f}$
• B. $E_{b}>\,E_{f}$
• C. $E_{b}=E_{f}$
• D. there is no definite relation between $E_{b}$ and $E_{f}$.

Answer 1

Answer: (A)

For endothermic reaction, $\Delta H=+\mathrm{ve}$
$\Delta H=E_{f}-E_{b},$ it means $E_{b}<\,E_{f}$