$(25$ points$)$ Propane gas enters a continuous adiabatic heat exchanger at $40C$ and $250$kPa and exits

at $240C.$ Superheated steam at $300C$ and $5\mathrm{.}0$ bar enters the exchanger flowing countercurrently to

the propane and exits as a saturated liquid at the same pressure.

$($a$)$ Taking as a basis $100$mol of propane fed to the exchanger, draw and label a process flowchart.

$($b$)$ Choose the reference conditions for propane and water and prepare an inlet$-$outlet enthalpy table

$($c$)$ Use an energy balance to calculate the required mass feed rate of the steam.

$($d$)$ Calculate the heat transferred from the water to the propane $($in $kW).$