Question

What is the relationship between excess volume and gibbs free energy?

Answer 1

Excess molar volumes (VE), viscosities, refractive index, and Gibbs energies were evaluated for binary biodiesel + benzene and toluene mixtures at 298.15 and 303.15 K. The excess molar volumes VEwere determined from density, while the excess Gibbs free energy of activation G*Ewas calculated from viscosity deviation Δη. The excess molar volume (VE), viscosity deviation (Δη), and excess Gibbs energy of activation (G*E) were fitted to the Redlich-Kister polynomial equation to derive binary coefficients and estimate the standard deviations between the experimental data and calculation results. All mixtures showed positive VEvalues obviously caused by increased physical interactions between biodiesel and the organic solvents.

Answer 2

Answer:

Excess enthalpy, volume, and Gibbs free energy of ... ideality can be attributed mainly to the formation of mixed association complexes.