APPLICATIONS OF GENERALISED PERTURBATION THEORY OF CHEMICAL REACTIVITY IN THE KINETICS OF THERMAL DECOMPOSITION OF THE SALTS AND ITS SOLUBILITY IN WATER

摘要

The kinetics of isothermal decomposition of 13 selenites was studied.The values of the activation energy,pre-exponential factor in the Arrhenius equation and the change of entropy for the formation of the activated complex by the reagent were calculated.The existence of kinetic compensation effect was established.The relationships in the changes of the values of these parameters were interpreted in the terms of generalised perturbation theory of chemical reactivity.Using the same theory,the changes of the kinetic parameters of thermal decomposition,dehydration and solubility product of a number of similar compounds were also elucidated.Based on the examples cited and the discussion,it may be concluded that a number of relationships observed between the physicochemical parameters and properties of the substances could be regarded as originating from the same feature-the different electronic structures of their atoms and the perturbation interactions taking place between the atomic orbitals.The Klopman's generalised perturbation theory of chemical reactivity can successfully be used for interpretation of a number of relationships in the behaviour of chemical compounds.