Question

A reversible heat engine operates with an efficiency of 50%. If during each cycle it rejects 150 cal to a reservoir of heat at 30 °C then what is the temp of the other reservoir?

Answer 1

The temperature of the other reservoir is 60 degree Celsius.

Explanation:

Efficiency "η" = 50 % = 0.5

η = 1 - T (sink) / T(source)

0.5 = 1 - 30 / T(source)

0.5 = 30 / T(source)

T (source ) = 30 / 0.5 = 60 degree Celsius

Thus the temperature of the other reservoir is 60 degree Celsius.

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