+1 vote
in Mass Transfer by (37.1k points)
The molar average velocity of the components in a binary mixture in which they are in equimolar counter diffusion is

(a) Equal to mass average velocity

(b) Zero

(c) Always negative

(d) Always positive

I have been asked this question in an interview for job.

My question is taken from Diffusion in a Binary Gas Mixture topic in chapter Diffusion in Solids and Molecular Diffusion in Fluids of Mass Transfer

1 Answer

0 votes
by (39.8k points)
Right choice is (b) Zero

The explanation is: NA=-NB.

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