Study of thermodynamic properties of binary solutions of lithium bromide or lithium chloride with methanol

Vapor pressure p of LiBr + CH3OH and LiCl + CH3OH solutions at T = (298.15-323.15) K were reported, osmotic, activity coefficients (ϕ, γ) and the activity of the solvent as have been evaluated. The experiments were carried out for LiBr + CH3OH solutions in the molality range m = (0.22046-11.51477) mol kg−1 and for LiCl + CH3OH solutions in the molality range m = (0.34002-6.17615) mol kg−1. The Antoine equation is used for to fit the experimental vapor pressure results and the Pitzer-Mayorga model with inclusion of Archer's ionic strength dependence of the third virial coefficient was used for the calculation of osmotic coefficients. The parameters of the Archer extended Pitzer-Mayorga model were used for evaluation of activity coefficients.