$1$The trichloroethane concentration of $0\mathrm{.}1\%($mole $\%)$ in a feed stream $($consisting of trichloroethane and water$)$ will be reduced to $0\mathrm{.}001\%($mole $\%)$ using a pervaporation membrane. The thickness of the membrane is $1\mathrm{.}3$ micrometer. If the vapor pressure of the trichloroethane at the feed temperature is $0\mathrm{.}13$ atm and the total pressure on the permeate side is $0\mathrm{.}01$ atm.

a$)$ Calculate the flux of trichloroethane $($Don$\text{'}$t forget to write the units$)$

b$)$ What is the membrane's selectivity? Is this membrane suitable for separating trichloroethane from water?

Trichloroethane

Water

Diffusivity $($cm$^2/$sec$)$

$3$x$107$

$1\mathrm{.}4$x$106$

Solubility $($mole$/$cm$^3.$atm$)$

$2\mathrm{.}2$x$103$

$0\mathrm{.}18$