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# heat pumps and refrigerators ?

You want the freezer to convert 10.6 kg of water at 21.0°C to 10.6 kg of ice at −9.7°C in 2.00 h. The power rating of the freezer must stay below 100 W. From these requirements, determine the minimum COP of the freezer that will satisfy the conditions. (Consider that the specific heat of water is 4,186 J/(kg · °C), the specific heat of ice is 2,090 J/(kg · °C), the latent heat of fusion of water is 3.33 ✕ 105 J/kg, and the latent heat of vaporization of water is 2.26 ✕ 106 J/kg.

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