Acoustic and volumetric investigations of 1,5-pentanediol plus glycerol at298.15 K; Comparison with recalculated data for: 1,3-butanediol plus glycerol and 2-methyl-2,4-pentanediol plus glycerol

The speed of ultrasound in and the density of mixtures of 1,5-pentanediol w ith glycerol have been measured at 298.15 K. The pulse-echo-overlap techniq ue was used to determine the speed. The excess values of the molar volume a nd molar adiabatic compressibility were estimated and expressed by Redlich- Kister polynomials. The data are analyzed and discussed in terms of molecul ar interactions; the excess values of the molar adiabatic compressibility a re furthermore compared with the recalculated results of previous investiga tions of 1,3-butanediol + glycerol und 2-methyl-2,4-pentanediol + glycerol.