A Carnot engine, having an efficiency of η = 1 / 10 as a heat engine, is used as a refrigerator. If the work done on the system is 10 J , the amount of energy absorbed from the reservoir at a lower temperature is

Question

A Carnot engine, having an efficiency of η = 1 / 10 as a heat engine, is used as a refrigerator. If the work done on the system is 10 J , the amount of energy absorbed from the reservoir at a lower temperature is, 99 J, 90 J, 1 J, 100 J

MARKS App · Accepted Answer

Relation between coefficient of performance and efficiency of refrigerator is β = 1 - η η ∴ β = 1 - 1 10 1 10 = 9 Coefficient of performance, β = Heat absorbed ( Q 2 ) Work done ( W ) ⇒ 9 = Q 2 10 Q 2 = 90 J

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