A Carnot refrigerator operates between reservoirs at -20C
Chapter 21, Problem 21.68(choose chapter or problem)
A Carnot refrigerator operates between reservoirs at -20C and 50C in a 25C room. The refrigerator is a 40 cm * 40 cm * 40 cm box. Five of the walls are perfect insulators, but the sixth is a 1.0-cm-thick piece of stainless steel. What electric power does the refrigerator require to maintain the inside temperature at 20C?
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