It is desired to compress one kg of air from the initial state of 300 K and 1 bar to the final state of 300 K and 10 bar. There are several possibilities by which the air can be taken from the initial state to the final state. Some of the possible paths are:
a) Isothermal compression.
b) Cooling at constant pressure followed by heating at constant volume.
c) Reversible adiabatic compression followed by cooling at constant volume.
d) Heating at constant volume followed by cooling at constant pressure.
Show the processes on a P-v diagram and calculate which is the most economical process?