SECOND LAW OF THERMODYNAMICS (SLOT)

(1) FLOT is law of conservation of energy, and according to it all chemical and physical processes take place in a such way that energy remain constant

(2) In FLOT we introduce enthalpy and internal energy.

(3)When two body at different temperatures are kept closed toeach other there will be transfer of heat while the transfer of heat take place called not explain by FLOT.

(4) we can not explain spontaneous and irreversible behaviour of processes by using FLOT.

In 2nd law of thermodynamics we will introduce entropy as criteria of spontaneity.

STATEMENT OF 2ND LAW :. "It is impossible to construct the heat engine which can take heat from a source and completely convert into work without creating any disturbance in the surrounding.