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Mass Transfer
Diffusion
GATE 2009
Medium

According to the penetration theory of mass transfer, the mass transfer coefficient (k) varies with diffusion coefficient (D) of the diffusing species as

  • AD
  • BD^(−1/2)
  • D^(1/2)
  • DD^(3/2)

Explanation

Higbie's penetration theory gives k=2√(D/(π·tc)), so k∝D^(1/2).

Source: GATE CH 2009 (2009)

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