Consider a steam turbine, taking steam at 1.5 MPa, 300°C expands reversibly adiabatically to 40°C. Calculate the work output (kJ/kg) of the turbine for 1 kg of steam.

Properties at 40°C

Psat = 7.384 KPa, Sf = 0.5725 kJ/kgK, Sfg = 7.6845 kj/kgK

hf = 167.57 kJ/kg, hfg = 2406.7 kJ/kg

At 1.5 MPa, and t = 300°C

s1 = 6.9189 kJ/kgK, h1 = 3037.6 KJ/kg