Mass transfer co-efficient (K) and diffusivity D. are related according to film theory as______________________?
Correct answer: A. K ∝ D
- A. K ∝ D
- B. K ∝√D
- C. K ∝ D1.5
- D. K ∝ D2
Explanation
Film theory gives the mass-transfer coefficient as approximately diffusivity divided by film thickness, K ≈ D/δ. With film thickness treated as fixed, K is directly proportional to D.
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