A freely moving piston cylinder device containing steam at 270 degrees Celsius and 1000 kPa is taken outside ona cold winter day and left cooled until 0.25m^3 of liquid and 0.75m^3 of water vapor are left in the cylinder. Determine:
a. Final temperature T_2
b. Total mass of water in the piston cylinder device, m_tot
c. Initial volume V_1
d. Sketch the process on the P-v and T-v diagrams with respect to the saturation lines.