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Metastable states and stability limits of binary solutions. (English) Zbl 0826.76095

The conditions for thermodynamic stability of a two-component isotropic solution are analyzed, and the diffusive isodynamic and adiabatic spinodal curves for this solution are derived. The coordinates in which these thermodynamic stability limits become the envelopes of a single- parameter family of surfaces (with entropy, volume or concentration being the parameter) are determined. It is shown that the projections of the curves that are loci of the critical points are the envelopes of the families of projections of diffusive spinodal curves. The limits of thermodynamic stability of solutions of the type Ar-Kr are determined within the single-liquid model. The behavior of the thermodynamic quantities on the diffusive spinodal curve is described.

MSC:

76T99 Multiphase and multicomponent flows
80A22 Stefan problems, phase changes, etc.
80A17 Thermodynamics of continua
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