AIPMT 2010 Physics and Chemistry Paper

In endothermic reactions, energy of reactants is less than that of the products. Potential energy diagram for endothermic reactions is,
where, Ea= activation energy of forward reaction
Ea′= activation energy of backward reaction
∆H= enthalpy of the reaction
From the above diagram,
Ea′=Ea′+∆H
Thus, ‌‌Ea>∆H