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The exhaust temperature of a heat engine is 290 ∘C∘C . What must be the high...

The exhaust temperature of a heat engine is 290 ∘C∘C .

What must be the high temperature if the Carnot efficiency is to be 23 %% ?

Express your answer using two significant figures.

A heat engine uses a heat source at 500 ∘C∘C and has an ideal (Carnot) efficiency of 28 %% .

To increase the ideal efficiency to 42 %% , what must be the temperature of the heat source?

An ideal Carnot engine is operated between a hot and a cold reservoir. The temperature difference between the two reservoirs is 284°C. If the efficiency of this ideal engine is 24.0%, find the temperature of the cold reservoir in degrees Celsius.

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