Question

Why is $∆\mathrm{G}$ 0 at equilibrium?

Answer 1

Gibbs free energy:

1. Gibbs free energy which is also called Gibbs function, Gibbs energy, or free enthalpy, is a term used to estimate the greatest amount of work done in a thermodynamic system while temperature and pressure remain constant.
2. The sign 'G' stands for Gibbs free energy.

At equilibrium:

1. The equilibrium given by $∆\mathrm{G}=0$ is known as the spontaneous equilibrium.
2. This means that the reaction rate for both the forward and backward reactions will be constant.

Hence, $∆\mathrm{G}$ is 0 at equilibrium.