A piston/cylinder arrangement of initial volume 0.025 m³ contains saturated water vapor at 200◦C. The steam now expands in a quasi-equilibrium isothermal process to a final pressure of 200 kPa while it does work against the piston. Determine the work done in this process by a numerical integration (summation) of the area below the P–V process curve. Compute about 10 points along the curve by using the computerized software to find the volume at 200◦C and the various pressures. How different is the work calculated if ideal gas is assumed?