Question:

Consider the following reversible reaction, A(g) + B(g)⇌AB(g). The activation energy of the backward reaction exceeds that of the forward reaction by 2RT (in J mol⁻¹). If the pre-exponential factor of the forward reaction is 4 times that of the reverse reaction, the absolute value of ΔG° (in J mol⁻¹) for the reaction at 300 K is _______. [Given ln(2) = 0.7, RT = 2500 J mol⁻¹ at 300 K and G is the Gibbs energy].