6.5 Isentropic Expansion of Air In piston-cylinder device, a mass of 2g of air (ideal gas, variable specific heat) is isentropically expanded from 5MPa and 1600K until the volume is 10 times the initial volume. Using tables on pages 2-3, determine the final temperature, work, and heat for the process. kJ Repeat the computation assuming constant specific heats under the cold air assumption, C = 0.716. kgK