Equilibrium condition in the course of a reversible chemical reaction is in which no net change in the amounts of reactants and products occurs. At cquilibrium, the reaction is half completed. [A]=[B] Thus,
[B]
[A]
=1 According to standard free Gibbs energy, ΔG°=−RT‌ln‌K ΔG°=−RT‌ln(l) [ΔG°=0] Hence, at equilibrium condition, the reaction is half-completed i.e., A⇌B.
