For a reversible endothermic reaction , the overall enthalpy change is . If the activation energy of — Chemical Kinetics Chemistry Question

Question

For a reversible endothermic reaction $A \rightarrow B$, the overall enthalpy change is $\Delta H = +20 \text{ kJ/mol}$. If the activation energy of the forward reaction is $E_{a(f)} = 85 \text{ kJ/mol}$, calculate the backward activation energy $E_{a(b)}$.