Abstract
In calculating equilibrium compositions of complicated organic systems it is advantageous to aggregate whole homologous series; in fact, chemical reactions can be written in terms of homologous series at a specified partial pressure of ethylene. The standard Gibbs energies of formation, enthalpies of formation, entropies, and heat capacities of homologous series may be calculated as a function of ethylene pressure. The change in standard Gibbs energy of formation at a specified partial pressure of ethylene may, for a reaction written in terms of homologous series groups, be used to calculate an equilibrium constant that can be used to calculate the equilibrium composition. The interpretation of the effect of temperature and pressure on the equilibrium is more complicated because the stoichiometric coefficients are functions of the ethylene partial pressure and temperature.
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