Maxwells law of diffusion

Maxwell postulated that the partial pressure gradient in the direction of diffusion for a constituent of a two-component gaseous mixture was proportional to  

It may be noted that equation 10.86 is identical to equation 10.30. (Stefan s Law) and, Stefan s law can therefore also be derived from Maxwell s Law of Diffusion. 

By comparing equation 10.89 with Stefan s Law (equation 10.30) the effective diffusivity of A in the mixture (DO is given by  

Multicomponent mass transfer is discussed in more detail by Taylor and Krishna 0 CussLER f and Zielinski and Hanley  

Whilst the diffusion of solution in a liquid is governed by the same equations as for the gas phase, the diffusion coefficient D is about two orders of magnitude smaller for a liquid than for a gas. Furthermore, the diffusion coefficient is a much more complex function of the molecular properties. 

A method of calculating the effective diffusivity / in terms of each of the binary diffu- 

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