No abstract

Vapor and liquid equilibrium-phase compositions and refractive indices were determined for the /-butanecarbon dioxide system at 100°, 160°, 220°, and 250°F from the vapor pressure of /-butane to pressures in the critical region. The equilibrium ratios for each component were calculated at each temperature from the phase composition data. The equilibrium-phase densities were calculated from the measured phase composition and refractive index data by use of the Lorentz-Lorenz molar refractivity relationship.

nesium chloride in the NaCl-MgCI2 system; yet, the excess free energy of mixing is much less.In conclusion, the behavior of the sodium chloridemanganous chloride system is only moderately complicated In that quadratic terms in the Harned expressions are sufficient to give an accurate description of the activity coefficients and that estimates of trace activity coefficients from single salt data are In reasonable agreement with experimental values.

Vapor and liquid equilibrium-phase compositions and refractive indices were determined for the /-butaneethane system at 100.6°, 160.4°, 219.7°, and 249.6°F from the vapor pressure of /-butane to pressures in the critical region for the system. An analysis of data reported earlier on this system at temperatures of 32°, -

Vapor and liquid equilibrium phase compositions and refractive indices have been determined for the nitrogenii'pentane system at 39.7, 99.6,160.0, and 220.0 °F and at pressures from the vapor pressure of n-pentane to about 3000 psia. The equilibrium ratios for each component were calculated at each temperature from the phase composition data. The equilibrium phase densities were calculated from the measured phase composition and refractive index using the Lorentz-Lorenz molar refractivity relationship.