Mass Transfer - Engineering

Q1:

Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as

A K ∝D

B K ∝D

C K ∝D1.5

D K ∝D2

ANS:B - K ∝D

The penetration theory, also known as the Danckwerts theory, relates the average mass transfer coefficient (𝐾K) with diffusivity (𝐷D) as: 𝐾∝𝐷1.5K∝D1.5 So, the correct option is: 𝐾∝𝐷1.5K∝D1.5