The activation energy for a simple chemical reaction A → B is Ea in the forward reaction. The activation energy of the reverse reaction:

Engineering

Chemistry

Calculation of Various Parameters at Equilibrium

Order of Reaction and Law of Mass Action

Arrhenius Equation

Question

The activation energy for a simple chemical reaction A → B is E_a in the forward reaction. The activation energy of the reverse reaction:

Is negative of E_a

Is always less than E_a

Can be less than or more than E_a

Is always double of E_a

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As we know,
For exothermic reaction,
ΔHº = (PE of product) - (PE of reactant) < 0.
(E_a)f, < (E_a)b.
For endothermic reaction:
(E_a) < (E_a)b.