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When a man returns to his well- sealed house on a summer day, he finds that the house is at35°C. He turns on the air conditioner, which cools the entire house to 20°C in 30 min. If the COPof the air- conditioning system is 2.8, determine the power drawn by the air conditioner. Assume the entire mass within the house is equivalent to 800 kg of air for which Cv = 0.72 kJ/ kg - °Cand Cp = 1.0 kJ/ kg °C. In kW.

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