Abstract
This paper examines the conditions of thermodynamic stability of a two-component homogeneous and isotropic system. It is shown that if in a certain region of its existence such a system exhibits diffusion instability, then the spinodal surface in the Δμ, p, T – space is the envelope of a one-parameter family of surfaces, where the respective parameter is either the molar volume, entropy or concentration. It has been found that the projections of lines of critical points onto the Δμ, p; Δμ, T and p, T surfaces are the envelopes of the family of projections of the diffusion spinodal when the parameter is the molar volume, entropy or concentration, correspondingly. The laws revealed in the behavior of the stability boundary and the line of critical points of a two-component system are illustrated in the framework of a one-liquid solution model.
Published Version
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