Reaction Kinetics and Catalysis Letters

, Volume 37, Issue 1, pp 127–132 | Cite as

Correlation between entropy and enthalpy factors during heterogeneous complex catalytic reactions

  • E. Valtcheva
  • S. Veleva


The correlation equations are discussed between entropy and enthalpy factors during complex heterogeneous catalytic reactions based on the dependence of the Gibbs energy on the surface coverage. The existence of the entropy heterogeneity in the adsorption layer leads to the correlations between ΔSθ and ΔHθ. In the cases where the increase of ΔHθ is accompanied by an increase of ΔSθ, i. e. when the entropy factors lead to a decrease of the interval of heterogeneity, the known thermodynamic compensation effect is observed.


Entropy Physical Chemistry Enthalpy Catalysis Gibbs Energy 
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Обсуждаются уравнения корреляций энтропийных и энтальпийных факторов в реакциях комплексного гетерогенного каталиэа, основанные на зависимостях энергии Гиббса на поверхностных покрытиях. Существование энтропийной гетерогенности в адсорбционном слое приволит к корреляции между ΔSθ и ΔHθ. Если увеличение ΔHθ сопровождаетсф увеличением ΔSθ, когда энтропиьные факторы приводят к уменьшению интервала гетерогенности, то наблюдается известный термодинамический эффект компенсации.


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Copyright information

© Akadémiai Kiadó 1988

Authors and Affiliations

  • E. Valtcheva
    • 1
  • S. Veleva
    • 1
  1. 1.Higher Institute of Chemical TechnologySofiaBulgaria

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