Air, initially at 27 degrees C, is contained in a piston-cylinder. Calculate the minimum work required to compress the air until the pressure doubles assuming the process to be:
a) adiabatic
b) isothermal
In each case assume the compression to be reversible. Do this for:
1) constant specific heats
2)nonconstant specific heats
Show both processes on the same T-s and P-v diagram with a common starting point.