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Q.

The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is −200C, the temperature of the  surroundings to which it rejects heat is about

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a

110C

b

410C

c

310C

d

210C

answer is C.

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Detailed Solution

β=T2T1−T2

5=253T1−253

5T1−5×253=253

T1=31oC

 

 

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