STATISTICAL PHYSICS IS BASED ON FOLLOWING POSTULATES :
1. Any gas is considered to be made up of molecules which are in continuous random motion and these molecules behave like elastic spheres of extremely small size.
2. In phase space, all the cells are of small size.
3. In a macrostate, all accessible microstates are equally probable. This is called the postulate of equal a priori probability.
4. The equilibrium state of a gas corresponds to the macrostate of maximum probability.
5. Total number of molecules in a system always remains constant.
6. Total energy of the system is always constant.
1. Any gas is considered to be made up of molecules which are in continuous random motion and these molecules behave like elastic spheres of extremely small size.
2. In phase space, all the cells are of small size.
3. In a macrostate, all accessible microstates are equally probable. This is called the postulate of equal a priori probability.
4. The equilibrium state of a gas corresponds to the macrostate of maximum probability.
5. Total number of molecules in a system always remains constant.
6. Total energy of the system is always constant.
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