The two tanks are connected to each other by a $0\mathrm{.}65m$ long cylindrical

connection with an inner diameter of $5mm.$ One of these tanks contains nitrogen

$($N$2)$ and the other contains $CO2.$ The tanks are kept at $200$kPa and $25C.$

Diffusivity value $0\mathrm{.}075cm2$

$/$s$.$ At $t=0,$ this connection between the tanks opens. Find the time required for

the mole fraction of nitrogen to be $0\mathrm{.}70$ at one end and $0\mathrm{.}25$ at the other end, the

direction and transfer rates of mass transfer for $CO2$ and $N2,$ the speed of each

species, and the molar flow rate of the mixture.