### Q.10:- A refrigerator is to maintain eatables kept inside at 9°C. If room temperature is 36° C, calculate the coefficient of performance.

**Answer:-**

Temperature inside the refrigerator, *T*_{1} = 9°C = 282 K

Room temperature, *T*_{2} = 36°C = 309 K

Coefficient of performance = T_{1} / (T_{2} – T_{1})

= 282 / (309 – 282)

= 10.44

Therefore, the coefficient of performance of the given refrigerator is 10.44.