Air is contained in a piston-cylinder assembly, initially at 40 lbf/in^2 and 600R. 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