A well-insulated tank contains 25 kg of Refrigerant 134a, initially at 300 kPa with a quality of 80%. The pressure is maintained by nitrogen gas acting against a flexible bladder. The valve is opened between the tank and a supply line carrying Refrigerant 134a at 1.0 MPa, 120 oC. The pressure regulator allows the pressure in the tank to remain at 300 kPa as the bladder expands. The valve between the line and the tank is closed at the instant when all the liquid has vaporized. Determine the amount of refrigerant admitted to the tank, in kg

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