In case of gases, the binary diffusivity is proportional to (where, P = pressure) ?
Correct answer: B. 1/P
- A. P
- B. 1/P
- C. 1/√P
- D. √P
Explanation
For gases, molecular diffusivity is approximately inversely proportional to total pressure, expressed as D_AB ∝ 1/P. Increasing pressure reduces the mean free path and therefore lowers diffusivity.
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