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 350°C 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.