The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is -20°C, the temperature of the surroundings to which it rejects heat is
Coefficient of performance (β) of a refrigerator is defined as the ratio of quantity of heat removed per cycle to the work done on the working substance per cycle to remove this heat.
Given, coefficient of performance of a refrigerator β=5
Temperature of surface i.e. inside freezer,
Temperature of surrounding i.e. heat rejected outsider T1=?