A thermally insulated piston cylinder device initially contains
0.2m^3, 0.8kg of air at 20 degrees Celcius, and the piston is
free to move. Now air at 600kPa and 80 degrees Celcius is slowly
applied to the device through a supply line until the volume
increases by 50 percent. Using constant specific heats and
assume air as ideal gas, determine the entropy generation. I've
been thinking about this for a long time but could not figure it
out. I would appreciate any help.