QUESTION $2$

$($PO$3,$ CO$1,$ C$2,$ C$2,$ C$3,$ C$4)$

In the anaerobic fermentation of grain, the yeast Saccharomyces cerevisiae digests glucose from plants to form the products ethanol and propenoic acid by the following overall reactions:

Reaction $1$: $C_6{H}_{12}{O}_{6}2C_2{H}_{5}OH+2C{O}_2$

Reaction $2$: $C_6{H}_{12}{O}_{8}2C_2{H}_{3}C{O}_{2}H+2H_{2}O$

A feed of $3500$ kg enters the reactor, consisting of $12wt\%$ glucose and the remaining balance being water. The reactor is designed to yield a $78\%$ conversion of glucose and $120$ kg of carbon dioxide are released into the atmosphere.

a$)$ Sketch and label the flow diagram of the above process.

$(2$ marks$)$

b$)$ Distinguish between yield and selectivity.

$(2$ marks$)$

c$)$ Calculate the moles of unreacted reactant.

$(4$ marks$)$

d$)$ Using the extent of reaction method, determine the molar composition of ethanol and propenoic acid exiting the reactor.

$(9$ marks$)$