Question: A heat engine operates between a 3 0 0 K reservoir and a 2 5 0 K reservoir. 1 2 0 J of heat are

A heat engine operates between a 300K reservoir and a
250K reservoir. 120J of heat are removed from the 300K
reservoir.
a) If 110J of heat are expelled to the 250K reservoir,
determine the work done by this heat engine (in J) and
the efficiency of the heat engine.
b) What is the maximum amount of useful work a heat engine could possibly do working
between these two temperatures after extracting 120J of heat from the 300K reservoir?

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