a$)$ In a reactor, carbon monoxide $(CO)$ reacts with water vapour $(H_{2}O)$ to form carbon dioxide $(C{O}_2)$ and hydrogen $(H_2).$ The gaseous feed mixture to the reactor consists of $53$ moles $\frac{?}{\text{h}\text{C}\text{O}},10$ moles $\frac{?}{hC{O}_2}$ and $40$ moles $\frac{?}{h}$ of steam $($supplied at $800C)$ in which $20$ moles $\frac{?}{h}$ of $H_2$ are produced.

i$)$ Draw and label the flow diagram of the process.

$(4$ marks$)$

ii$)$ By relating to reaction's stoichiometric equation, identify limiting and excess reactants.

$(4$ marks$)$

iii$)$ Determine the fractional conversion of water vapour to $H_2.$

$(4$ marks$)$

iv$)$ Determine the molar composition of the exit stream of the reactor.

$(8$ marks$)$