State the various statements of second law of thermodynamics.

Explanation

(i) Kelvin- Plank statement : It is impossible to construct a machine that absorbs heat from a hot source and converts it completely into work by a cyclic process without transferring a part of heat to a cold sink
(ii) Clausius statement : it is impossible to transfer heat from a Cold reservoir to a hot reservoir without doing some work .
(iii) Entropy statement : The entropy of an isolated system increase during a spontaneous process.