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The coeffcient of performance of a refri...

The coeffcient of performance of a refrigerator working between `10^(@)C` and `20^(@)C` is

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`T_(1) - 273 + 20 = 293 K`
`T_(2) = 273 + 10 = 283 K`
`:. Beta = (T_(2))/(T_(1) - T_(2)) = (283)/(293 - 283)= (283)/(10) = 28.3`.
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