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Kinetic parameters of decomposition of some selenites

Generalized perturbation theory of chemical reactivity

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Abstract

Studying the kinetics of isothermal decomposition of thirteen selenites at isothermal heating, the values of activation energy E of the process, pre-exponential factor A in Arrhenius equation and changes of entropy Δ S ≠ MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYfdmGievaebbnrfifHhDYfgasaacH8srps0lbbf9q8WrFfeuY=Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciGacaGaaeqabaWaaeaaeaaakeaacqqHuoarcaWGtbWaaWbaaSqabeaacqGHGjsUaaaaaa@39EC@ for the formation of the activated complex of the reagent were calculated. Direct dependence between the thermal stability of the selenites and their cation radii on their 'hardness' or 'softness' was found. The dependence was interpreted in the terms of the generalized perturbation theory of chemical reactivity. Kinetic compensation effect was observed only for the selenites, which thermally decompose by the same mechanism.

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  1. Department of Physical Chemistry, Assen Zlatarov University, Bourgas, Bulgaria, 8010

    Vlaev L T, Georgieva V G & Genieva S D

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  1. Vlaev L T
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  2. Georgieva V G
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Vlaev, L.T., Georgieva, V.G. & Genieva, S.D. Kinetic parameters of decomposition of some selenites . J Therm Anal Calorim 83, 421–427 (2006). https://doi.org/10.1007/s10973-005-6918-y

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