Mass transfer co-efficient is directly proportional to DAB according to the __________ theory?
Correct answer: A. Film
- A. Film
- B. Penetration
- C. Surface-renewal
- D. None of these
Explanation
In film theory, the mass-transfer coefficient is approximately k = D/δ, where δ is the stagnant-film thickness, so it is directly proportional to diffusivity. Penetration and surface-renewal theories generally give a square-root dependence on diffusivity instead.
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