A 12 ft^3 rigid tank initially contains saturated water vapor at 250 F. The tank is connected by a valve to a supply line that carries steam at 160 psia and 400 F. Now the valve is opened, and steam is allowed to enter the tank. Heat transfer takes place with the surrounds such that the temperature in the tank remains constant at 250 F at altimes. The valve is closed when one-half of the volume of the tank is occupied by liquid water. Initially the tank contained 0.86856 Ibm of water (vapor) and at the final state the tank contained 353.38 lbm of water (liquid/vapor mixture). The mass of steam that came in the tank is 352.51 Ibm. The quality at the final state is 0.001229. What is the heat transfer out of the tank in units of Btu? Select the answer that is closest to the true value. A) 176,300 B) 235,000 C) 294,000 D) 353,000 O A O B OD

A rigid, well-insulated tank is initially empty. The tank is kept connected by means of a valve to a steam line carrying steam at 2 MPa and 400 °C. The valve is opened and the steam flows slowly into the tank until the tank pressure balances with the pressure of the line. Determine the final temperature of the steam in the tank. *Take note that the line pressure is kept constant during this process.

A-C line Liquid R-134a A rigid container containing 6.6 kg of saturated liquid R-134a at 24°C is used to fill an air-conditioning system. A valve is opened and allows liquid R-134a to escape the tank into the A-C line until only 0.49 kg of R-134a remains in the tank, at which point the valve is closed. During the process, heat transfer is allowed to occur to maintain the tank temperature at 24°C. What is the quality of the refrigerant inside the tank at the end of the process? What is the total heat transfer for this process? KJ

Refrigerant-134a (R-134a) enters the expansion valve of a refrigeration system at 650 kPa with a quality of 20%. The pressure of R-134a at the outlet is 200 kPa. a)Determine the temperature of R-134a at the outlet in oC. Calculate the difference of internal energy between the outlet and inlet in kJ/kg