Gibbs free energy mixed complexes

The method of Tardy and Garrels (1974) gives approximate estimates of Gibbs free energy values for mica compounds regardless of their chemical complexity. Nevertheless, the linearity of the method cannot account for the energy of mixing contributions. Experimental data on mica mixtures are also... 

If the heat capacity of a chemically complex melt can be obtained by a linear summation of the specific heat of the dissolved oxide constituents at all T (i.e., Stebbins-Carmichael model), the melt is by definition ideal. The addition of excess Gibbs free energy terms thus implies that the Stebbins-Carmichael model calculates only the ideal contribution to the Gibbs free energy of mixing. 

FIGLfRE 2. Calculated Gibbs free-energy values of unsolvated and solvated mixed complexes between a chiral lithium amido ether and methyllithium... 

Similar although somewhat more complex analyses can be applied to estimate AGy when a large change in composition (at constant temperature) triggers a phase transformation. In such cases, the analysis depends on the functional dependence of the Gibbs free energy of mixing between the components involved in the system. Such analyses are beyond the scope of the present text. 

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