Kelvin-planck statement of second law of thermodynamics is related to _____.

Kelvin-planck statement of second law of thermodynamics is related to _____.

a. Heat pump
b. Heat engine
c. Refrigerator
d. Mass transfer

Correct Answer : b. Heat engine

Explanation :

According to Kelvin-Planck statement it is impossible to construct cyclically operating device, the sole effect of which is to absorb energy in the form of heat and to deliver an equivalent amount of work. That means it is impossible to build a heat engine whose thermal efficiency is 100%