Liquid mixtures at high pressures referred to a pseudospinodal curve: ethanol–methylcyclopentane and carbon disulfide–tetramethylsilane

Abstract

Experimental excess volume, surface tension and isothermal compressibility measurements at atmospheric pressure are reported for ethanol–methylcyclopentane at 298.15 K. These data have been used to estimate the molar volume of the mixture up to 200 MPa through a novel procedure. Surface tension measurements at 293.15 K for carbon disulfide–tetramethylsilane are also reported. These data, together with measurements of molar volume and isothermal compressibility at atmospheric pressure previously reported for this mixture, have been used to make an analogous study up to 100 MPa. Comparison with experimental data is rather satisfactory for both systems. Differences between experimental and calculated volumes are commonly less than 1%, which allow us to predict adequately the pressure behaviour of the molar excess volume.