3 kg of air at a pressure of 150 kPa and temperature 360 K is compressed polytropically to 7 50 kPa according to law p V 1 · 2 =C. The gas is then cooled to initial temperature at constant pressure....

3 kg of air at a pressure of 150 kPa and temperature 360 K is compressed polytropically to 7 50 kPa according to law p V^{1 · 2}
=C. The gas is then cooled to initial temperature at constant pressure. The air is then expanded at constant temperature till it reaches original pressure of 150 kPa. Draw the cycle on p-V diagram and determine the net work and heat transfer.