Steady-State Molecular Diffusion in Gases

Your objectives in studying this section are to be able to  

Calculate molar fluxes during steady-state molecular, one-dimensional diffusion in gases. 

Calculate molar fluxes for steady-state gaseous diffusion of A through stagnant B, and for equimolar counterdiffusion. 

Consider steady-state diffusion only in the z direction without chemical reaction in a binary gaseous mixture. For the case of one-dimensional diffusion, equation (1-20) becomes 

For a gaseous mixture, if the temperature and pressure are constant, c and DAB are constant, independent of position and composition. According to equation (1-69), all the 

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Interestingly, there are three different cases of steady-state molecular diffusion in gases. ... 

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