Help Solving Gas Turbine Problem with Polytropic Expansion

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The discussion revolves around solving a gas turbine problem involving the polytropic expansion of air. The scenario includes three pounds-mass of air expanding from 2100°F to 900°F at a specific exhaust pressure. Participants seek guidance on calculating work produced per pound-mass of air, power generated, and heat transfer rates. There is a request for foundational formulas or starting points due to limited knowledge of physics among some contributors. Assistance is needed to clarify the concepts and calculations involved in the problem.
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hey can anyone help me with this problem...

three pounds-mass per second of air is reversibly and polytropically (n=1.48) expanded in a gas turbine from 2100F to 900F. if the exhaust pressure is 15psia, determine the work produced per pound-mass of air, the power generated, and the rate of heat transfer.

i...dont...understand...what...this...means... :confused:

thank you
 
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So, yeah, I'm attempting to help my nephew out with this; however, my knowledge of physics is limited (haven't studied in a number of years). If any person is willing to at least assist me with a starting point or a formula to follow that would be great.
 

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