A rigid tank has a volume of 0.06m3 and initially contains a two-phase liquid-vapour mixture of H2O at a pressure of 15 bar and a quality of 20%. As the tank contents are heated, a pressure-regulating valve keeps the pressure constant in the tank by allowing saturated vapour to escape. Neglecting kinetic and potential energy effects.
a. Determine the total mass in the tank, in kg, and the amount of heat transfer, in kJ, if heating continues until the final quality is x = 0.5.