A $5$mm sheet of Pd membrane is used for purifying H$2.$ On the impure side, the

concentration of H$2$

is $1\mathrm{.}5$ kg$/$cm$3$

$,$ while on the pure side concentration of H$2$ is $0\mathrm{.}3$

kg$/$cm$3.$

Assume that the partial pressure is maintained on both sides and D$=10-9$ m$2$

$/$s

Diffusion coefficient of H$2$

$$Find diffusive flux across the membrane.

$$Amount of H$2$ purified per hour, if area of the membrane is $0\mathrm{.}2$ m$2$

$$What should be done to improve the rate of purification?