Molar Gibbs free energy of mixing

Figure A2.5.15. The molar Gibbs free energy of mixing versus mole fraetionxfor a simple mixture at several temperatures. Beeause of the synuuetry of equation (A2.5.15) the tangent lines indieating two-phase equilibrium are horizontal. The dashed and dotted eiirves have the same signifieanee as in previous figures.

To obtain AmixGm, the molar Gibbs free energy of mixing, we divide equation (7.5) by n — J2 n> t0 obtain... 

Fig. 3.14.4. Variation of the molar Gibbs free energy of mixing with composition of a binary mixture, as determined according to the Flory-Huggins model, Eq. (3.14.24), with = 0.1 and for various values of A jRT. Tick marks indicate location of minima.

Fig. 3.17.1. Variation of reduced molar Gibbs free energy of mixing with composition for a mixture with to > 0, Different curves correspond to different RT/w values. Dashed curve shows the locus of points for local minima.

Problem 3.4 Starting from Flory-Huggins equation (3.50) show that for the formation of a solution from a monodisperse polymer the partial molar Gibbs free energy of mixing, AGi, for the solvent is given by Eq. (3.53). 

Division by the total number of moles of all components, Motai = l]y=i > yields the molar Gibbs free energy of mixing ... 

Consider the molar Gibbs free energy of mixing for a polymer solution, AG. Evaluate AG for a polymer with degree of polymerization T2 = 1000 at a polyma- concentration <1)2 = 0.2, when ... 

Now consider the mixing of components 1 and 2 at constant temperature and pressure. The molar Gibbs free energy of mixing, can... 

The molar Gibbs free energy of mixing of a binary mixture, is plotted vs. X2 (mole fraction of component 2) in Fig. 4.29 at constant temperature and pressure. Show that the intercepts of with X2 = 0 and af2 — 1 axes are... 

For nonideal solutions, the molar Gibbs free energy of mixing is... 

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