Chemistry - Chemical Kinetics Question with Solution | TestHub

An exothermic reaction$\mathrm{X}\to \mathrm{Y}$has an activation energy$30 \mathrm{kJ} {\mathrm{mol}}^{-1}$. If energy change$\mathrm{\Delta E}$during the reaction is$-20 \mathrm{kJ}$, then the activation energy for the reverse reaction in$\mathrm{kJ}$is              (Integer answer)