The black grille on the back of a refrigerator has a surface temperature of 95 F with a total surface area of 10 ft2. Heat

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The black grille on the back of a refrigerator has a surface temperature of 95 F with a total surface area of 10 ft2. Heat transfer to the room air at 70 F takes place with an average convective heat transfer coefficient of 3 Btu/h ft2 R. How much energy can be removed during 15 minutes of operation?

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