A heat engine operates between a cold reservoir at temperature T _ 2 = 400K and a hot reservoir at temperature T _ 1 . It takes 300J of heat from the hot reservoir and delivers 240J of heat to the cold reservoir in a

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Correct answer: 500

Recall the formula of efficiency of heat engine in terms of work done and heat supplied to the source, η = W Q _ H = 1 - T _ L T _ H , here T _ L and T _ H , is the temperature of the sink and source ⇒ (60)/(300) = 1 - 400 T _ H ⇒ T _ H = 500K .

A heat engine operates between a cold reservoir at temperature T _...

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