The mass transfer co-efficient for a solid sphere of radius 'a' dissolving in a

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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