Predict the spontaneity of a forward (or) a reverse reaction based on DeltaG of a reversible reaction.

Predict the spontaneity of a forward (or) a reverse reaction based on

1.	Predict the spontaneity of a forward (or) a reverse reaction based on DeltaG of a reversible reaction.
Answer» Solution :The value of `K_(c)` is directly related to the Gibbs free energy change `(DeltaG)` of the reaction. 1. If `DeltaG` = -ve, then the reaction is spontaneous, and proceeds in the forward reaction. 2. If `DeltaG` = +ve, then the reaction is non-spontaneous in the forward direction. The REVERSE reaction will be spontaneous, and thus proceed towards the reactants' SIDE. 3. If `DeltaG` = 0, then the reaction is at equilibrium. No net change takes place.