Carnot engine, efficiency, power, entropy changes imagine a carnot engine that operates between the temper- atures th 850 k and ti 300 k. the engine performs (a) (b) what is the average power of this engine? 1200 j of work each cycle, which takes 0.25 s what is the efficiency of this engine? (c) how much energy lql is extracted as heat from the high-temperature reservoir every cycle? (d) how much energy lqj is delivered as heat to the low- temperature reservoir every cycle? (e) by how much does the entropy of the working substance change as a result of the energy transferred to it from the high-temperature reservoir? from it to the low-temperature reservoir?