Refrigerant-134a is throttled irreversibly through an insulated, horizontal, constant diameter tube. Saturated liquid R-134a enters the tube at 80.0°F and exits the tube at 10.0°F.
a. What is the increase in entropy per lbm of R-134a flowing through the tube?
b. What is the entropy production rate per unit mass flow rate of R-134a?
c. Show the initial and final states on a T-s diagram.
d. Determine the average Joule-Thomson coefficient for this process.