An enclosed ideal gas completes the following cycle:
• Step 1: It expands isobarically at 200kPa from 0.020m3 to 0.030m3.
• Step 2: At constant volume, the pressure decreases to 120kPa.
• Step 3: It is compressed isobarically at 120kPa back to the initial volume of 0.020m3.
Calculate the net work done on the gas over the entire cycle. State the answer with sign and proper units.