Propane gas enters a continuous adiabatic heat exchanger at $40C$ and $250$kPa and exits at $240C.$ Superheated steam at $300C$ and $5$ bar enters the heat exchanger flowing counter$-$currently to the propane and exits as a saturated liquid at the same pressure.

a$)$ What is the mass feed rate of the steam if propane enters the exchanger at a rate of $100mo\frac{l}{h}r?$

b$)$ What is the heat transferted from the water to the propane?