+1 vote
in Mass Transfer by (37.1k points)
What will be the values of the diffusivities (in cm^2/s) at the mean gas-film temperature?

(a) 0.923,0.267

(b) 0.483,1.351

(c) 0.294,0.368

(d) 1.381,0.364

I got this question in unit test.

Question is taken from Multicomponent Diffusion topic in chapter Diffusion in Solids and Molecular Diffusion in Fluids of Mass Transfer

1 Answer

0 votes
by (39.8k points)
The correct answer is (a) 0.923,0.267

The best I can explain: Use the relation D∝T1.75

             Mean gas-film temperature= (30+20)/2=25°C.

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