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The condition of occurrence of the thermodynamic coupling of chemical reactions isanalysed from kinetics. It is found that the thermodynamic coupling is impossible for those reactionswhich obey kinetically the mass action law. The thermodynamic coupling of chemical reactionsis further analysed in the case with catalyst. It is found that the thermodynamic coupling which isimpossible without catalyst may become possible by introducing proper catalyst into the system. Thisimplies that the catalysts can change not only the rates of chemical reactions, but also the behaviorsof thermodynamic coupling of chemical reactions, including the direction of some reactions. Suchrole of catalysts comes into play not by changing the total free energy of the system, but by changingthe reaction mechanism.
The condition of occurrence of the thermodynamic coupling of chemical reactions isanalysed from kinetics. It is found that the thermodynamic coupling is impossible for those reactionswhich obey kinetically the mass action law. The thermodynamic coupling of chemical reactionsis furtheralysed in the case with catalyst. found that the thermodynamic coupling which isimpossible without catalyst may become possible by introducing proper catalyst into the system. Thisimplies that the catalysts can change not only the rates of chemical reactions, but also the behaviors of thermodynamic coupling of chemical reactions, including the direction of some reactions Suchrole of catalysts comes into play not by changing the total free energy of the system, but by changingthe reaction mechanism.