Question

The direction of flow of heat is unidirectional I.e. always from hotter to colder body . This is best explained by
(1) First law of thermodynamics
(2) Second law of thermodynamics
(3) law of conservation of energy
(d) none

Answer 1

law of conservation of energy

Answer 2

Hi friend,

This can be explained on the basis of SECOND LAW OF THERMODYNAMICS as The second law of thermodynamics is a general principle which places constraints upon the direction of heat transfers and the attainable efficiencies of heat engines.

HOPE THIS HELPS YOU:-))