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It is defined as the degree of randomness or disorder due to rise in temperature in the system. The more the heat absorbed by the system the more disordered it becomes or more entropy it has. When the heat is absorbed by the system at low temperature it becomes more disordered as compare to when the heat is absorbed at higher temperature.

Example:- The crystalline solid has lowest entropy. The liquid has intermediate entropy and the gas has highest entropy.

Entropy is an extensive property as it depends upon the mass of the system. Entropy is a point function.

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