A spring-loaded piston-cylinder device is initially filled with 0.13 lbm of an R-134a liquid vapor mixture whose

Question:

A spring-loaded piston-cylinder device is initially filled with 0.13 lbm of an R-134a liquid vapor mixture whose temperature is 230oF and whose quality is 80 percent. The spring constant in the spring force relation F 5 kx is 37 lbf/in, and the piston diameter is 12 in. The R-134a undergoes a process that increases its volume by 50 percent. Calculate the final temperature and enthalpy of the R-134a.