Air is contained in a piston-cylinder assembly, initially at 40 lbf/in2 and 600 ?R. The air expands in a poly tropic 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/in2, and
b) The work and heat transfer, each in Btu/lb of air