a engine is operating via the Carnot cycle; The engine operates between 1000 K and 300 K. a) What is its (maximum) efficiency? b) How could it’s efficiency be changed to 80%? c) If an automobile engine can be approximated as a Carnot engine, absorbing heat at the combustion temp of 800K and emitting heat at its operating temp of 470K, calculate its (maximum) base efficiency. Will it operate more efficiently in the summer or winter?

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