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Electrical refrigerator contains 242 gr.Freon(mm.121).For the evaporation of 1 mole of this freon we need 4,8kcal.the capacity of the refrigerator is 120 liters.The performance coefficient is 25%.To incease the temperature of one mole of air to 1 C degree we need 7 cal.How many times must the freon recycle to decrease the temperature of the refrigerator-air to 12 C degree.

PLEASE IS URGENT!!!!!

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# Homework Help: Thermodynamics of refrigerator

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