In a gas-phase diffusion mass-transfer process, the steady-state flux of helium in a binary mixture of helium and neon is 3.8 x 10-9 kgmole/cm2 s, and the flux of neon is 0. At a particular point in the diffusion space, the concentration of helium is 0.023 kgmole/m3 and the concentration of neon is 0.045 kgmole/m3 . Estimate the individual net velocities of helium and neon along the direction of mass transfer, the average molar velocity, and the average mass velocity.''

Explanation:

Let's assume that Helium is He and Neon is Ne

Then, the expression of the steady-state flux of Helium in a binary mixture of Helium and Neon is:

where;

= concentration of Helium

= net velocity of Helium

Making the subject, we have:

The expression for the steady-state flux of Neon

Here;

= Concentration of neon

= net velocity of neon species

Thus, the net velocity of species Ne along the direction of mass transfer = 0 m/s

The average velocity V is:

The average mass velocity is:

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