A refrigerator is to maintain eatables kept inside at 7C. The coefficient of performance of refrigerator if room temperature is 38C is:

15.5

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16.3

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20.1

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9.03

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Solution

The correct option is A 9.03
Temperature inside the refrigerator, $T_{1} = 7^{0} C = 280 K$

Room temperature, $T_{2} = 38^{0} C = 311 K$

Coefficient of performance $= \frac{T_{1}}{(T_{2} - T_{1})}$

$= \frac{280}{(311 - 280)} = 9.03$

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9^{o} C

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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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