For an elementary reaction

CHEMISTRY · Subjective · A Level · Chemistry · Kinetics · Kinetics

Problem

For an elementary reaction, the activation energy in the forward direction is

75\,\text{kJ mol}^{-1}

and the overall energy change is

\Delta E = -40\,\text{kJ mol}^{-1}

(products lower in energy than reactants). Calculate the activation energy for the reverse reaction, reporting your answer in

\text{kJ mol}^{-1}