Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and 't' is time)
A. $${\left( {{{\text{D}}_{\text{e}}}.{\text{t}}} \right)^{\frac{1}{2}}}$$
B. $${\left( {\frac{{{{\text{D}}_{\text{e}}}}}{{\text{t}}}} \right)^{\frac{1}{2}}}$$
C. $${\left( {\frac{{4{{\text{D}}_{\text{e}}}}}{{\pi {\text{t}}}}} \right)^{\frac{1}{2}}}$$
D. $$\frac{{4{{\text{D}}_{\text{e}}}}}{{\text{t}}}$$
Answer: Option C
This Question Belongs to Chemical Engineering >> Mass Transfer
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