Thermodynamics Second Law of Thermodynamics and Entropy Performance of Heat Engines and Reversed Heat Engines
In a cold storage, ice melts at the rate of 2 kg per hour when the external temperature is 20 °C. The minimum power output of the motor used to drive the refrigerator which just prevents the ice from melting is (latent heat of fusion of ice = 80 cal g-1)
1
28.5 W
2
13.6 W
3
9.75 W
4
16.4 W