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Question

A refrigerator has to transfer an average of 263 J/s of heat from temperature 10 C to 25 C. What will be the average power consumed by the refrigerator? (Assume no power loss in the process)

A
15 W
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B
35 W
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C
394.5 W
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D
920.5 W
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Solution

The correct option is B 35 W
Given
Q2=263 J/s
T2=10C = 10+273=263 K
T1=25C = 25+273=298 K

β=Q2W=T2T1T2
Work done per sec, W=Q2(T1T2)T2
W=263 (298263)263
W=35 W

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