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 What is the Carnot efficiency of a heat engine operating between a hot reservoir at 300°C and a cold reservoir at 10°C? 

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CARNOT CYCLE | Easy and Basic

What is the hot reservoir temperature of a Carnot heat engine that does <math display="inline"><mrow><mn>120</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">J</mi></mrow></math> work each cycle while expelling <math display="inline"><mrow><mn>100</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">J</mi></mrow></math> to a <math display="inline"><mrow><mn>300</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">K</mi></mrow></math> cold reservoir?

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