A two-phase liquidvapor mixture of Refrigerant 134a is

Chapter 6, Problem 6.116

(choose chapter or problem)

A two-phase liquid–vapor mixture of Refrigerant 134a is held in a large storage tank at 100 lbf/in.\(^{2}\) , 50\(^{\circ}\)F, as illustrated in Fig. P6.114. A technician fills a 3.5-ft\(^{3}\) cylinder that is initially evacuated to take on a service call. The technician opens a valve and lets refrigerant from the storage tank flow into the cylinder until the pressure gage on the cylinder reads 25.5 lbf/in.\(^{2}\) (gage). The surrounding atmospheric pressure is 14.5 lbf/in.\(^{2}\) Assuming no heat transfer and neglecting kinetic and potential energy effects, determine the final mass of refrigerant in the cylinder, in lb, and the amount of entropy produced, in Btu/\(^{\circ}\)R.