One kilogram of air acting as an ideal gas is operating in a cycle of three processes. The states which begin and end these processes are: 1P-4 bar and V=1 m3, 2P=1 bar and V=4 m3, 3P=1 bar and V=2 m3. Data for air acting as an ideal gas can be found here: https://www.engineersedge.com/thermodynamics/properties-of-air13692.htm
Process 1-2 is a polytropic process with n=1. Processes 2-3 and 3-1 proceed along straight lines in P-V space.
Plot this cycle on a P-V plane, calculate the temperature at each state, and fill in the table supplied. Provide answers in kJ. R=0.287 kJ/kg-K.
Process Q W n U
1-2
2-3
3-1