Plot Problems 4.97 and 4.98 on the same P-V diagram. Also plot the isobaric process from the initial state to the final volume. Which process produces the greatest P-V work? Explain how you used the P-V diagram to answer this question.

Problems 4.97

7 kg water initially at 500 kPa and 2 m³ is expanded to a volume of 5 m³ in an isothermal process. Use EES or NIST and a spreadsheet to plot the process on a P-V diagram. At least ten points should be used from the initial to final state, in order to produce a smooth curve.

Problems 4.98

7 kg water initially at 500 kPa and 2 m³ is expanded to a volume of 5 m³ in an isentropic process. Use EES or NIST and a spreadsheet to plot the process on a P-V diagram. At least ten points should be used from the initial to final state, in order to produce a smooth curve.