The diffusivity D. in a binary gas mixture is related to the temperature (T) as________________________?
Correct answer: C. D ∝ T1.5
- A. D ∝ T
- B. D ∝ T0.5
- C. D ∝ T1.5
- D. D ∝ T2
Explanation
For binary gas diffusion at approximately constant pressure, diffusivity follows the Chapman-Enskog relationship and varies roughly as T^1.5. Therefore, D is proportional to T1.5 rather than simply T or T0.5.
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