A cooler is used to cool water from 30°C to 5°C. The cooler has steady- flow, and the mass flow rate of water is 1 ??/?.  The cooler emits 146.3 kW  of heat to the atmosphere. The coefficient of performance of the cooler is 2.5.  How much electrical work is required to run the cooler?  The specific heat of water is 4.18 ?? /?? ∙ ?.

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Q: Compare Isentropic Process and Polytropic Process.

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