For the equilibrium, A(g) B(g), ⇋ ΔH is –40 kJ/mol. If the ratio of the activation energies of the forward (Ef ) and reverse (Eb ) reactions is 2/3 then :
(1) Ef = 80 kJ/mol; Eb = 120 kJ/mol
(2) Ef = 60 kJ/mol; Eb = 100 kJ/mol
(3) Ef = 30 kJ/mol; Eb = 70 kJ/mol
(4) Ef = 70 kJ/mol; Eb = 30 kJ/mol
