Question

Saturated water vapor at 200 kPa is in a constant pressure piston cylinder. At this state the piston is 0.1 m from the cylinder bottom and cylinder area is 0.25 m². The temperature is then changed to 200°C. Find the work in the process

Answer 1

State 1  (P, x): v₁ = v_g = 0.8857 m³/kg (also in B.1.3)

State 2 (P, T): v₂ = 1.0803 m³/kg

Since the mass and the cross sectional area is the same we get