Diffusion of water vapor in air

[lesy1]

I would like to calculate a diffusion of water vapor in stagnant air. Does anybody know if it is a case of equimolar or nonequimolar diffusion. How one could calculate a diffusion in my case? Which variables is diffusion coefficient dependent on?

 

[Bob S]

This might be of some help:

http://cambridge.org/us/engineering/author/nellisandklein/downloads/examples/EXAMPLE_9.2-1.pdf

Bob S

[added] here is another example:

http://cambridge.org/us/engineering/author/nellisandklein/downloads/examples/EXAMPLE_9.4-2.pdf