The mass transfer co-efficient for a solid sphere of radius ‘a’ dissolving i

Question

The mass transfer co-efficient for a solid sphere of radius ‘a’ dissolving in a large volume of quiescent liquid, in which „D’ is the diffusivity of solute, is _____________________?

Options:

A . D/a

B . D/2a

C . Proportional to √D

D . Dependent on the Reynolds number

Answer: Option D
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