Vapor pressures, osmotic and activity coefficients of electrolytes in protic solvents at different temperatures. 1. Lithium bromide in methanol

摘要

Precise vapor pressure data for LiBr solutions in methanol are given for temperatures ranging from 298.15 to 333.15 K. The molality range is from 0.0411 to 6.8675 mol-kg(-1). Osmotic coefficients were calculated by taking into account the second virial coefficient of methanol. The parameters of the Pitzer-Mayorga model, the Archer extension of the Pitzer-Mayorga model, themole-fraction-based thermodynamic model of Clegg-Pitzer, and the recently developed MSA-NRTL model are evaluated, along with the corresponding standard deviation. These equations were used to calculate activity coefficients of LiBr in methanol solutions.