A piston-cylinder device initially contains 0.8 m³ of saturated water vapour (steam) at 250 kPa. At this state, the piston is resting on a set of stops and the mass of the piston is such that a pressure of 300 kPa is required to move it. Heat is slowly transferred to the steam until the volume doubles.

 a)  Show the process on a P-V diagram with respect to saturation lines.  

b)  Determine the mass of the steam.   

c)  Determine the initial temperature of the steam.  

d)  Determine the final temperature of the steam.  

e)  Calculate the work done during this process.