$4$

$2.(20$ points$)$ A $20-f{t}^3$ rigid tank contains superheated $R-134$a vapor at $160$ psia and $120F.$ The refrigerant is now cooled at constant volume until the pressure drops to $50$ psia $,$ where it is in the process of condensing.

$**$DO NOT TREAT THE REFRIGERANT AS AN IDEAL GAS!!

a$)$ Show this process on the $P-v$ diagram given below.

b$)$ Determine the total mass $($in lbm$)$ of refrigerant.

c$)$ Calculate the quality at the final state.

d$)$ How much refrigerant has condensed $($in lbm$)?$

$**$Include a picture