Diffusion Coefficients for Binary Ideal Gas Systems

Your objectives in studying this section are to be able to  

Estimate diffusion coefficients for binary gas systems using the Wilke-Lee equation with tabulated values of the Lennard-Jones parameters. 

The theory describing diffusion in binary gas mixtures at low to moderate pressures has been well developed. Modem versions of the kinetic theory of gases have attempted to account for the forces of attraction and repulsion between molecules. Hirschfelder et al. (1949), using the Lennard-Jones potential to evaluate the influence of intermolecular forces, presented an equation for the diffusion coefficient for gas pairs of nonpolar, nonreacting molecules  

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