Abstract
In this paper, the temperature and composition dependencies of the volumetric behavior are studied for the ethane-1,2-diol + 2-methoxyethanol + 1,2-dimethoxyethane + water quaternary system. Density data were collected at different temperatures ranging from −10 to 80 ∘C and at atmospheric pressure over the whole composition range, 0≤ x i (i = 1, 2, 3, 4)≤ 1. Moreover, we also made use of the results on the six binary (ij) and four ternary (kij) subsystems studied previously. The excess molar volume (V E ) data have been fitted to an equation derived from the well-known Redlich–Kister equation and some interesting correlations were found. Furthermore, in order to represent in an effective way the behavior of the VE = VE(x i ) function (and of the derived partial molar quantities) in the quaternary domain, a new algorithm has been developed, which gives 3D plots where the dependent function is depicted by means of “colored slices” of the tetrahedron corresponding to the investigated composition quaternary domain.
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