1.

State : (a) Second law of thermodynamics in terms of entropy. (b) Third law of the thermodynamics.

Answer» (a) Sencond law of thermodynamics in terms of entropy : The entropy of the universe always increases in the course of every spontaneous (natural) change.
(b) Third lae of thermodynamics : The entropy of a perfectly crystalline substance is zero at zero Kelvin.


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