An insulated, vertical piston-cylinder device initially contains 10 kg of water, 6 kg of which is in the vapor phase. The mass of the piston is such that it maintains a constant pressure of 200 kPa inside the cylinder. Now steam at 0.5 MPa and 350oC is allowed to enter the cylinder from a supply line until all the liquid in the cylinder has vaporized. Determine
(a) The final temperature in the cylinder and
(b) The mass of the steam that has entered.

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P-200kPa m: 10 kg H,O P, = 0.5 MPa 350C FIGURE P5-118