Question

For an endothermic reaction, energy of activation
is Eₐ and enthalpy of reaction of ΔH (both of
these in kJ/mol). Minimum value of Ea will be.
(a) less than ΔH (b) equal to ΔH
(c) more than ΔH (d) equal to zero

Answer 1

Answer :- (c) more than ΔH

Answer 2

(c) more than ΔH

Explanation:

For endothermic reactions, the energy of reactants is less than that of the products.

So Ea = Ea' + ∆H

Where Ea is activation energy of forward reaction, Ea' is activation energy of reverse reaction and ∆H is enthalpy of the reaction.

Therefore we infer that Ea > ∆H.

Option C is the answer.