Groundwater Mass Transport and Heterogenous Equilibrium ChemicalReaction-----A Kind of Free Boundary Problem

This paper considers another kind of chemical reaction different from [1]. The difference is that the chemical reactions under consideration are assumed to be heterogeneous,, fast, reversible.and classical. As a typical example, the author reduces this problem to an one phase Stefan problem with nohcommon data, and investigates the classical solution as well as the weak solution.