Assignment:
Knudsen diffusion in a porous solid Porous silica gel is used to adsorb propane from helium at 373 K and 1 atm. Typical values of parameters for porous silica gel are as follows: porosity = 0.486, tortuosity = 3.35, and pore diameter = 22 A.
(a) Calculate the Knudsen number for flow inside the pores.
(b) Calculate the effective diffusivity of propane under these conditions.
Provide complete and step by step solution for the question and show calculations and use formulas.