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a Carnot cycle, then, its efficiency is ITH| to convert water to ice is given by

a Carnot cycle, then, its efficiency is ITH| to convert water to ice is given by

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(4 blanks) An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0 °C and rejects heat to a room at 24.0 °C. Suppose that 85.0 kg of water at 0.0 °C are converted to ice at 0.0 C. How much energy (in Joules) must be supplied to the machine to achieve this task? Sol. Since the machine is a operating in a Carnot cycle, then, its efficiency is e = |-1 /TH| By virtue of first law, the work done to convert water to ice is given by W = Q = %3D Thus, the total energy needed to convert 85 kg of water is ET = 687.5 J
Transcribed Image Text:(4 blanks) An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0 °C and rejects heat to a room at 24.0 °C. Suppose that 85.0 kg of water at 0.0 °C are converted to ice at 0.0 C. How much energy (in Joules) must be supplied to the machine to achieve this task? Sol. Since the machine is a operating in a Carnot cycle, then, its efficiency is e = |-1 /TH| By virtue of first law, the work done to convert water to ice is given by W = Q = %3D Thus, the total energy needed to convert 85 kg of water is ET = 687.5 J
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