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Catalysts and thermodynamic coupling of chemical reactions
Author(s) -
Li RuSheng
Publication year - 1989
Publication title -
acta chimica sinica english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 0256-7660
DOI - 10.1002/cjoc.19890070404
Subject(s) - chemistry , catalysis , chemical reaction , coupling (piping) , thermodynamics , chemical stability , kinetics , coupling reaction , chemical kinetics , chemical energy , chemical thermodynamics , thermodynamic equilibrium , law of mass action , chemical equilibrium , computational chemistry , chemical physics , organic chemistry , non equilibrium thermodynamics , classical mechanics , mechanical engineering , physics , engineering
The condition of occurrence of the thermodynamic coupling of chemical reactions is analysed from kinetics. It is found that the thermodynamic coupling is impossible for those reactions which obey kinetically the mass action law. The thermodynamic coupling of chemical reactions is further analysed in the case with catalyst. It is found that the thermodynamic coupling which is impossible without catalyst may become possible by introducing proper catalyst into the system. This implies 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. Such role of catalysts comes into play not by changing the total free energy of the system, but by changing the reaction mechanism.