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Questions  

The coefficient of performance, in a mechanical refrigerator, the lower temperature coils of the evaporator are at 230Cand compressed gas in the condenser has a temperature of  770C, is

a
70
b
20
c
0.23
d
2.5

detailed solution

Correct option is D

cop=T2T1−T2=−23+27377+23=250100=2.5

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