Question

A refrigerator converts 100 g of water at 20°C to ice at – 10°C in 35 minutes. Calculate the average rate of heat extraction in terms of watts.

Given: Specific heat capacity of ice = 2.1Jg^-1.C^-1

Specific heat capacity of water = 4.2Jg-1.C^-1

Specific latent heat of fusion of ice = 336Jg^-1

Answer 1

∴ Heat given out per sec = 441000/(35 x 60)s = 2100