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How much energy does a refrigerator have to remove from 1.5 kg of water at 20 deg C to make ice at zero deg C.?
Wiki User
∙ 7y ago
Energy change to convert 1.5 kg of water at 20 deg C to water at 0 deg C:q = smT = 4.184 x 1.5.x 20 = 125.52 kJ
Energy change when 1.5 kg of water at 0 deg C is converted to ice at 0 deg C:
q = L x m ( where L is the latent heat per kg) = 334 x 1.5 = 501 kJ
Total = 125.52 + 501 = 626.52 kJ
Wiki User
∙ 7y ago
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