A refingerator works between $4^{\circ} \mathrm{C}$ and $30^{\circ} \mathrm{C}$. Ir is required to r

Question

A refingerator works between $4^{\circ} \mathrm{C}$ and $30^{\circ} \mathrm{C}$. Ir is required to remove 600 calories of heat every second in onder to keep the tempenture of the refrigerated space constant. The power required is (Take $1 \mathrm{cal}=4.2 \mathrm{~J}$ )

Professor PC Thomas Classes · Answer

$	ext{COP} = \frac{T_C}{T_H - T_C} = \frac{277}{26}$. $W = Q_C / 	ext{COP} = 600 	imes 4.2 	imes \frac{26}{277} \approx 236.5 	ext{ W}$.