Effects of Reaction Conditions on Equilibrium Yields

Because the standard states are the pure materials at unit fugacity, equation (2.6.5) may be rewritten as 

The fugacity coefficients (f/P) for the various species may be determined from a corresponding states chart if one knows the reduced temperature and pressure corresponding to the species in question. Therefore  

From the stoichiometry of the reaction it is possible to determine the mole numbers of the various species in terms of the extent of reaction and their initial mole numbers  

The various mole fractions are readily determined from this table. Note that the upper limit on is 25.0. Substitution of numerical values and expressions for the various mole fractions into equation (A) gives 

This equation is quadratic in . The solution is = 10.9. On the basis of 100 mol of starting material, the equilibrium composition is then as follows  

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