State the second law of thermodynamics in any two ways.

Explanation

II law of thermodynamics
Statements :
i) "It is impossible for a self acting machine unaided by any external agency to convert heat from a body at low temperature to a body at higher temperature.
(ii) All spontaneous process are thermodynamically inversible and entropy of the system increases in all spontaneous process.
(iii) For any spontaneous process taking place in an isolated system, the change in entropy `(triangleS)` is positive.