Q.10:- A refrigerator is to maintain eatables kept inside at 9°C. If room temperature is 36° C, calculate the coefficient of performance.
Temperature inside the refrigerator, T1 = 9°C = 282 K
Room temperature, T2 = 36°C = 309 K
Coefficient of performance = T1 / (T2 – T1)
= 282 / (309 – 282)
Therefore, the coefficient of performance of the given refrigerator is 10.44.