Question

The statement that 'heat cannot flow by itself from a body at a lower temperature to a body at a higher temperature', is known as

(a) zeroth law of thermodynamics

(b) first law of thermodynamics

(c) second law of thermodynamics

(d) third law of thermodynamics

Answer 1

Correct option is (c) second law of thermodynamics

It is impossible for a cyclic process to transfer heat from a body at lower temperature to one at a higher temperature without converting some heat to work. This is the statement of second law of thermodynamics.