Partial molar quantities and thermodynamic interaction parameters for some binary mixtures: CH₂Cl₂ + CS₂, CH₃OH + CCl₄, CH₃OH + C₆H₆ and CH₃OH + CHCl₃ systems

Abstract

The molecular structures and the solute-solvent interaction play vital role in finding the correlation between the like and unlike molecules in a mixture. The systems CH₂Cl₂ + CS₂, CH₃OH + CCl₄, CH₃OH + C₆H₆ and CH₃OH + CHCl₃ have been investigated over the whole composition range. Statistical thermodynamics shows a way to calculate the partial molar qualities, isothermal compressibilities and interaction parameters through a few parameters like density, hard sphere diameter, temperature. The interaction is represented by Kirkwood-Buff parameters <i>G_ij, G_jj </i>and <i>G_ii,</i> representing the like- like

and like-unlike molecular interactions. The partial molar volumes, partial vapour pressures and partial isothermal compressibilities have also been also calculated from statistical thermodynamics. The interaction parameters at different mole fractions are discussed and compared with other experimental results of partial vapour pressures.