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A refrigerator is to maintain eatables k...

A refrigerator is to maintain eatables kept inside at `9^@` C. If room temperature is `36^@C`, calculate the coefficient of performance.

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Room temperature `T_1`=36+273=309 K
Temperature inside the refrigerator (sink)
`T_2`=9+273=282 K
Coefficient of performance of a refrigerator ,
`alpha = Q_2/W=Q_2/(Q_1-Q_2)`
`because` Heat `Q_1` is released at temperature `T_1` and heat absorbed `Q_2` at temperature `T_2` and `Q prop T`
`therefore alpha = T_2/(T_1-T_2)=282/(309-282)`
`=282/27`=10.4
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