Using Energy Concepts and the Ideal Gas Model
Air is contained in a piston–cylinder assembly, initially at 40 lbf/in.2 and 600°R. The air expands in a polytropic process with n = k = 1.4 until the volume is doubled. Modeling the air as an ideal gas with constant specific heats, determine (a) the final temperature, in °R, and pressure, in lbf/in.2, and (b) the work and heat transfer, each in Btu per lb of air.
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