Question $3$

$(10$ points$)$

A stream of refrigerant$-134$a at $800$ kPa undergoes isobaric cooling from $312\mathrm{.}1$ K until the fluid becomes saturated liquid. The refrigerant is then expanded through a throttling valve until the pressure reaches $140$ kPa $.$

a$)$ Find the rate of heat rejection from the cooler.

$(4$ points$)$

b$)$ Determine the temperature and quality $($if applicable$)$ for the refrigerant at the exit of the throttle valve.

$(6$ points$)$