Vapor pressures, osmotic and activity coefficients for (LiBr + acetonitrile) between the temperatures (298.15 and 343.15) K

Abstract

Precise vapor pressure data for pure acetonitrile and (LiBr + acetonitrile) are given for temps. ranging from 298.15 to 343.15 K. The molality range is from m = (0.0579 to 0.8298) mol/kg-1. The osmotic coeffs. are calcd. by taking into account the second virial coeff. of acetonitrile. The parameters of the extended Pitzer ion interaction model of Archer and the mole fraction-based thermodn. model of Clegg-Pitzer are evaluated. These models accurately reproduce the available osmotic coeffs. The parameters of the extended Pitzer ion interaction model of Archer are used to calc. the mean molal activity coeffs.