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in Physics by (63.3k points)

A steady combustion of natural gas yields 0.15 kg/s of products (having approximately the same properties as air) at 1100°C, 100 kPa. The products are passed through a heat exchanger and exit at 550°C. What is the maximum theoretical power output from a cyclic heat engine operating on the heat rejected from the combustion products, assuming that the ambient temperature is 20°C? 

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C.V. Heat exchanger

We do not know the H.E efficiency, high T not constant. C.V. Total heat exchanger plus heat engine, reversible process.

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