Question

A Carnot engine whose low-temperature reservoir is at a temperature of -96.1 ∘C has an efficiency...

A Carnot engine whose low-temperature reservoir is at a temperature of -96.1 ∘C has an efficiency of 38.9 % . An engineer is assigned the problem of increasing this to 45.6 % .

Part A

By how many degrees must the temperature of the high-temperature reservoir be increased if the temperature of the low-temperature reservoir remains constant?

Part B

By how many degrees must the temperature of the low-temperature reservoir be decreased if that of the high-temperature reservoir remains constant?

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Answer #1

Use the definition of efficiency of engine in terms of temperature of hot and cold reservoir to find the required solution as shown below

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