a) State the third law of thermodynamics. B) Define entropy.

Explanation

(i) The third law of themodynamics states that The entropy of pure crystalline substance at absolute zero is zero. ,
(ii) It can also be stated as it is impossible to lower the temperature of an object to absolute zero in a finite number of step.
(iii) Mathematically, `{:("lim"),(Trarr0):}` S = 0 for a perfectly ordered crystalline state.