Application of the Arrhenius equation to solid state reactions

1 APPLICATION OF THE ARRHENIUS EQUATION TO SOLID STATE REACTIONS 

Historically, the identification of a linear correlation between log k and T 1 was empirical. First described by Hood [504], the relationship was given some theoretical significance by van t Hoff [505] who expressed the influence of temperature on equilibrium constants (Ke) by an equation of similar form, viz. 

This equation is familiar from thermodynamics (but problems arise in its application to the properties of solids due to the difficulties inherent in defining reactant concentration). Arrhenius [506] and Harcourt and Essen [507] extended Hood s observations to the form of eqn. (18) and a close examination of most textbook treatments suggests that this step was not 

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A theoretical explanation for the applicability of the Arrhenius equation to solid state reactions has recently been provided [35] (see also Chapter 4.). Determinations of the available energy levels associated with the reaction zone and their occupancy, perhaps by spectroscopic methods, may help in establishing the steps which control bond redistributions under these conditions. 

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