Abstract

A unified empirical equation of state for He3–4He mixtures is found in analytical form on the basis of the existing experimental P–V–T data for pure He3, He4, and their mixtures in the homogeneous liquid phase in the temperature interval 2.25–4.2 K and pressure interval 0–10 MPa. An algorithm for calculating the fitting coefficients of an approximating expression for P(V,T,c) is constructed. The average absolute error for the determination of P is ±0.015 MPa.

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