Questions
In a mechanical refrigerator, the low temperature coils of the evaporator are at -23°C and the compressed gas in t}le condenser has a temperature of 77°C. The coefficient of performance is
detailed solution
Correct option is D
β=T2T1âT2,T1=77âC=350K and T2=â23âC=250K β=250350â250=250100=2â 5Talk to our academic expert!
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An electrical refrigerator abstracts 2000 calories from ice trays. The coefficient of performance is 4. Then the work done by motor in calories is
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