Two competing reactions in a CSTR reactor at steady state:

$A+BD$

$A+BU$

A distillation column is used after the CSTR reactor to separate product D and U from unreacted

reactant A and B$.$ Unreacted A and B are recycled and added back to the feed directly. A schematic is

shown below:

a$)$ Determine the selectivity $S_{DU}$

b$)$ Determine $F_{\text{A}\text{f}\text{e}\text{e}\text{d}}$ and $F_{\text{B}\text{f}\text{e}\text{e}\text{d}}$

c$)$ Determine $F_{A0}$ and $F_{B0}$

d$)$ Determine $x_A$ and $x_B$