Abstract

The concentration fluctuations and the surface tension of binary mixtures of non-electrolytes have been measured at 298.15 K, using light scattering and plate tensiometry. The results show that all the mixtures are highly non-ideal, and present an important tendency to homocoordination. All the mixtures studied present negative values of the excess surface tension. The combination of the results of both techniques allows one to calculate the excess surface adsorption Γ12 of one of the components.

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