Air is contained in a piston-cylinder device. Initially the air is at a pressure of 100 kPa and temperature of 27 C before being compressed to 200 kPa. A second compression process increases the air pressure to 400 kPa. Finally, the air is expanded to the initial conditions, before the processes are repeated. Determine the net work (in k). Enter your answer to the nearest whole number. Do not include units or +/- signs with your answer.

Air is contained in a piston-cylinder device. Initially the air is at a pressure of 100 kPa and temperature of 27 C before being compressed to 200 kPa. A second compression process increases the air pressure to 400 kPa. Finally, the air is expanded to the initial conditions, before the processes are repeated. Determine the net work (in k). Enter your answer to the nearest whole number. Do not include units or +/- signs with your answer.