A process fluid that contains $75$mol$\%-$pentane and $25$ mol$\%$ hydrogen enters a cooling unit at $110C$ and $1$atm. The liquid stream emerges from the cooling unit contains only liquid $n-$pentane while the vapor stream leaves with $8$mol$\%n-$pentane. Both output streams leave the unit at $20C$ and $3\mathrm{.}5$ bar.

a$)$ Draw the flow chart of the process showing all the streams involved. Taking the basis of $100mo\frac{l}{s},$ calculate the amount of heat that should be removed to accomplish the cooling.

Ans: $-2912\mathrm{.}85k\frac{J}{s}(15$ marks$)$