3. The rigid tank illustrated in the Figure has a volume of 0.06m3 and initially contains a two-phase liquid-vapor 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 vapor to escape. Determine the total initial and final masses in the tank, in kg, and the amount of heat transfer, in kJ, if heating continues until the final quality is x=0.5. (Ans. 2546.5kJ )