HW#$4-1$ Refrigerant$-134$a enters a $20-$cm$-$diameter pipe steadily at $200$kPa and $20C$ with a velocity of

$5\frac{m}{s}.$ The refrigerant gains heat as it flows and leaves the pipe at $180$ kPa and $40C.$ Determine $($a$)$ the

volume flow rate of the refrigerant at the inlet, $($b$)$ the mass flow rate of the refrigerant, and $($c$)$ the

velocity and volume flow rate at the exit.