Calculate the Entropy of Ammonia in kJ/(kmol K) at T=130 oC and P=1 bar. The reference state is Entropy s=159.3 kJ/(kmol K) at Tref=26.9 oC an Pref=0.01 bar. Assume that in the vapor phase Ammonia behaves like an ideal gas.

t = 165°C, h = 3000 KJ/kg

p = 0.125 MPa, v = 1.3749 m3/kg

the following data are for steam power plant:Pressure and temperature of steam at boiler exit and turbine inlet (state2)=30 bar and 300°C. Pressure and quality of steam at turbine exit and condenser inlet (state 3) =20 kpa and 95%.Pressure of saturated water at condenser exit and pump inlet (state 4)=20 kpa.Pressure and temperature of water at pump exit and boiler inlet (state1)=30 bar and 100°C.Steam flow rate =15 kg/s.The heat losses from the body of the turbine =100 kW.Determine the thermal efficiency of the steam power plant