Abstract
Densities and speeds of sound of the (2,2,4-trimethylpentane+methylbenzene+butan-1-ol) ternary system as well as all its binary sub-systems were measured at four temperatures, namely 298.15K, 308.15K, 318.15K, and 328.15K at atmospheric pressure by a vibrating-tube densimeter DSA5000. The binary (isooctane+toluene) system was studied previously. Excess quantities (molar volume, adiabatic compressibility, and isobaric thermal expansivity) of the mixtures studied were calculated from the experimental densities and speed of sounds. The excess molar volume data were correlated using the Redlich–Kister equation. Both the positive and S-shaped excess molar volume curves were found for the systems studied. The excess molar volumes versus concentration of binary systems differed in the shape and temperature dependence. The experimental binary data were compared with literature data. The experimental excess molar volumes were analyzed by means of the Extended Real Associated Solution (ERAS) model. The experimental data and the ERAS model can help to estimate real behaviour of the systems studied.
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