If the system is isolated from the surroundings and then there is also no variation of properties in the system, then it said to call a thermodynamic equilibrium. There are three varieties of thermodynamic equilibrium:
1.7.1 Thermal Equilibrium
When the temperature is uniform all through the system, then the system is said to have a thermal equilibrium.
1.7.2 Mechanical Equilibrium
This process takes place when the pressure at all the parts of the system is uniform all over, then the system is said to have a mechanical equilibrium.
1.7.2 Chemical Equilibrium
This system is to be happen when there is no chemical reaction like diffusion or any transmission of matter in the system, then it is called chemical equilibrium.
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