Question $4($Problem $2\mathrm{.}41$ from $10{?}^{th}$ Edition of Borgnakke and Sonntag $[1])$

$2\mathrm{.}41$ R$-134$a is in a sealed, rigid vessel of $2m^3$ as sat$-$

urated vapor at $50C.$ It is now cooled to $20C.$

Find the mass of the R$-134$a and the quality in the

final state.

Also, show state points and process line on both a T$-$v $($temperature$-$specific volume$)$ and P$-$v $($pressure$-$

specific volume$)$ diagram. Include constant pressure$/$temperature lines and label the $P,T$ and $v$ values

corresponding to each state.