For a spontaneous or irreversible process occurring in an isolated system, when does the entropy of the system attain maximum value ? Under this condition, what will be the change in entropy of the system?

Explanation

When a spontaneous or irreversible process occurs in an isolated system, the entropy of the system increases with the progress of the process towards equilibrium. The value of entropy becomes maximum when the process attains equilibrium, and there occurs no further change in the entropy of the system. thus, the value of entropy is maximum at the equilibrium state of the process and under this condition, the change in entropy of the system is zero.