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

Question

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

Correct Answer

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