A spring loaded piston cylinder device is initially filled with 0.2 lbm of an R-134a liquid vapor mixture whose temperature is -30 deg F and whose quality is 80 percent. The spring constant in the spring force relation F=kx is 37 lbf/in and the piston diameter is 12 in. The R-134a undergoes a process what increases its colume by 40 percent.
Calculate the final temperature and the enthalpy of the R-134a.