Thermodynamic Equilibrium

 A system is said to be in equilibrium if it does not tend to undergo any change of state on its own accord.

THERMODYNAMIC EQUILIBRIUM

A system is said to be in equilibrium if it does not tend to undergo any change of state on its own accord. A system is said to be in thermodynamic equilibrium, then it should satisfy the following three conditions of equilibrium:

(a) Mechanical equilibrium:

A system is said to be in mechanical equilibrium when there are no unbalanced forces acting on it.

(b) Thermal equilibrium:

A system is said to be in thermal equilibrium when there is no temperature difference throughout the system.

(c) Chemical equilibrium:

A system is said to be in chemical equilibrium when there is no chemical reaction throughout the system.