How Does the Gibbs Free Energy Evolve in a System Undergoing Coupled Competitive Reactions?

• Ludovic Jullien ^[1] ; Anna Proust ^[1] ; Jean-Christophe Le Menn ^[1]
  1. [1] École Normale Supérieure

     École Normale Supérieure

     Francia

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 75, Nº 2 (February), 1998, págs. 194-199
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • The kinetic and thermodynamic behavior of a chemical system undergoing coupled competitive reactions is analyzed. It is illustrated by considering the hydrogenation reaction of a Vaska type complex. In a first part, the meaning of kinetic/thermodynamic controls and of kinetic stability is thoroughly revisited. The different regimes are defined by reference to the characteristic times emerging from equations describing the evolution. In a second part, it is shown how the Gibbs free energy of the reacting system varies when successively submitted to kinetic and thermodynamic controls.