A concentrated aqueous solution having initial concentration $C_{AO}=4\frac{\text{m}\text{o}\text{l}}{\text{l}\text{i}\text{t}\text{r}\text{e}},F_{Ao}=$

$1000\frac{\text{m}\text{o}\text{l}}{\text{m}\text{i}\text{n}},C_p=C_{p,\text{w}\text{a}\text{t}\text{e}\text{r}}$ is to be converted to $75\%$ in a mixed reactor. The rate of

reaction $-r_A=0\mathrm{.}4$ mol $A\frac{\text{c}\text{o}\text{n}\text{v}\text{e}\text{r}\text{t}\text{e}\text{d}}{\text{m}\text{i}\text{n}\text{.}\text{l}\text{i}\text{t}\text{r}\text{e}}.$

Determine $($a$)$ The size of the reactor and mention the unit.

$($b$)$ What is the heat duty if feed enters at $25C$ and the product needs to be withdrawn at that

same temperature?

$($c$)$ Make a comparison of this reactor size with the minimum size.