The diffusivity, DAB (for component A diffusing in B) is equal to the diffusivity DBA (for component B diffusing in A) for a binary mixture of________________?
Correct answer: D. Ideal gases
- A. Newtonian liquids
- B. Non-Newtonian liquids
- C. Real gases
- D. Ideal gases
Explanation
For a binary ideal-gas mixture, the mutual diffusivity is symmetric, so DAB equals DBA. The equality is a property of the binary mutual-diffusion description, not a distinction between Newtonian and non-Newtonian fluids.
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