1 kg of a fluid expands reversibly according to a linear law from 4.5 bar to 1.6 bar; the initial and final volumes are 0.004 m3 and 0.02 m3 . The fluid is then cooled reversibly at constant pressure, and finally compressed reversibly according to a law pV = constant back to the initial conditions of 4.5 bar and 0.004 m3 . Determine the work done in each process and the net work of the cycle. Sketch the cycle on a p-v diagram.

A gas is taken through the cyclical process shown in the figure below. If each unit on the horizontal axis equals 1.50 m3 and each unit on the vertical axis equals 4.50 x 105 Pa determine the net work done by the gas.

An ideal gas expands at constant pressure (P1=6.00x105 Pa) from a volume VA=1.00 m3 to a volume VB=4.00 m3. Next, the gas is compressed to a volume VC=2.50 m3 and a pressure P2=2.00x105 Pa. The gas finally returns to its initial state (P1=6.00x105 Pa and VA=1.00 m3). Work is the area under the PV-diagram curve and the sign matters. (See Figure and ignore the isotherms. They are not needed to solve the problem. Note, the figure is labeled in atmospheres while the problem statement uses Pascals—use Pascals) How much work is done on the gas during the first (isobaric) process? How much work is done on the gas during the second (general process)? How much work is done on the gas during the third (general process) How much work is done during one complete cycle of this process?

The initial pressure and volume are 80 kPa and 0.35 m3, respectively. The final pressure and volume are 170 kPa and 0.85 m3. How much work was done by the gas (in joules) in this process?