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Chemical Engineering - Mass Transfer - Discussion

Discussion Forum : Mass Transfer - Section 8 (Q.No. 3)
Mass Transfer
3.
Pick out the correct statement.
Diffusivity decreases with increase in temperature.
Diffusivity increases with increase in molecular weight.
Diffusivity increases with the size of the individual molecule.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.
Mongam Damodhar Rao said:   9 months ago
The given question is not specific whether it is for gases, liquids or solids.

Please describe it.
Afjal said:   11 months ago
The rate of diffusion is inversely proportional to the molecular weight of a compound.

This means that as the molecular weight increases, the rate of diffusion decreases.
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