The coefficient of performance of a refrigerator is 5.4. The compressor uses 20

Question

The coefficient of performance of a refrigerator is 5.4. The compressor uses 20 J of energy per cycle How much heat exhausted per cycle? If hi reservoir temperature is 25 what is the lowest temperature of the cold reservoir The coefficient of performance of a refrigerator is 5.4. The compressor uses 20 J of energy per cycle How much heat exhausted per cycle? If hi reservoir temperature is 25 what is the lowest temperature of the cold reservoir How much heat exhausted per cycle? If hi reservoir temperature is 25 what is the lowest temperature of the cold reservoir

Explanation / Answer

here,

coefficient of performance , COP = 5.4

Qh = 20 J

let the heat exhausted be Qc

COP = Qh/(Qh -Qc)

5.4 = 20/( 20 - Qc)

Qc = 16.3 J

the heat exhausted is 16.3 J

the high temprature , Th = 25 degree C

let the cold reservoir be Tc

Th /(Th - Tc) = COP

25 /( 25 - Tc) = 5.4

Tc = 20.4 degree C

the cold reservior temprature is 20.4 degree C

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