A mass of 0.2 kg of saturated refrigerant-134a is contained in a piston-cylinder device at 200 kPa. Initially, 75% of the mass is in the liquid phase. Heat is now transferred to the refrigerant at constant pressure until the cylinder contains vapor only. Determine:
(A) The volume occupied by the refrigerant initially
(B) The work done
(C) The total heat transfer