Thermodynamic properties of steam

Science

Steam is expanded isentropicaly  from a pressure of 40 bar – temperature 300 Degrees C to a pressure of 0.005 bar. I am looking for the final dryness fraction by calculation from the property tables.

I am also looking for the change in specific entropy when saturated water is boiled to produce dry saturated steam at 50 bar.

Lastly , how much steam is produced when 1 kg of water at 165 degrees C and 8 bar is flashed into a cylinder at 2 bar.