The temperature of a household refrigerator is maintained at 0C and the temperature of the room at 25C. The heat leaking into the refrigerator from the warm room is 8*10^6 J every 24 hours, enough to melt 50lb of ice in 50 hours. This heat must be removed from the refrigerator at 0C.
Q: If an ideal Carnot refrigerator were available, how many watts would be required to operate it? The answer is 8.48 Watts if that helps.