A reversible refrigerator to the surrounding atmosphere whic

A reversible refrigerator to the surrounding atmosphere, which is at 33 ^oC.  The refrigerator cools a source of mass 12 kg, with a specific heat of 1.01 kJ/kg.K, from 7 ^oC to -10 ^oC . Determine the work input to the refrigerator in kJ, to three significant figures.

Solution

solution

work input = m Cp Delta(T)

   = 12 X 1.01 X (7 - (-10) )

= 206.04 KJ