Abstract

The mass balance equation is derived for the lattice gas model of transfer diffusion in which the displacement of the centers of mass of particles is brought about by both common, “migrational”, motion and chemical exchange reaction of the type A + AX ⇌ AX + A. The form of Fick's second law involves a concentration-dependent diffusion coefficient. This concentration dependence must be taken into account when the c(x,t) functions are calculated by integrating the second law.

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