why the entropy is maximum when the system is in equilibrium. Plz explain in detail.
Dear Student,
Entropy of a system always tend to increase.
According to the Second Law of Thermodynamics a spontaneous change results in an increase in the entropy of the universe. In an isolated system, when the system's entropy reaches the maximum, the system stays there because any further change would reduce entropy. That's obviously the equilibrium position. If the system is not "isolated", the equilibrium position is when the entropy of the "system plus surroundings" reaches a maximum.
Regards
Entropy of a system always tend to increase.
According to the Second Law of Thermodynamics a spontaneous change results in an increase in the entropy of the universe. In an isolated system, when the system's entropy reaches the maximum, the system stays there because any further change would reduce entropy. That's obviously the equilibrium position. If the system is not "isolated", the equilibrium position is when the entropy of the "system plus surroundings" reaches a maximum.
Regards