Thermodynamics

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Question : 10
Total: 10
A refrigerator is to maintain eatables kept inside at 9°C. If room temperature is 36°C, calculate the coefficient of performance.
Solution:  
Here, T1=36°C=36+273=309K,
T2=9°C=9+273=283K
Coefficient of performance of the refrigerator
=
T2
T1T2

=
282K
309K282K

=
282K
27K
=10.4
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