Molar heat capacities for (1-butanol+1,4-butanediol, 2,3-butanediol, 1,2-butanediol, and 2-methyl-2,4-pentanediol) as function of temperature

Thermodynamic and transport properties of (1-Butanol+1,4-Butanediol) at temperatures from (298.15 to 318.15)K

“…Especially, the placement examination of hydroxyl groups in the isomeric butanediol molecules on the physicochemical properties of above-mentioned systems is interesting. In order to gain a better insight into H-bonds association, the nature and dynamics of the alcohol structures in these mixtures, we report the results of volumetric, viscometric, and acoustic investigations of {1-butanol (1BU) + 1,4-butanediol (1,4BD)} within the temperature range from (298.15 or 293.15 to 318.15) K. Now then, this work extends evidently our very recently reported investigations on isobaric heat capacities [6] for the system studied. As has been reported in the above-mentioned paper, the excess molar isobaric heat capacity C E p is very small.…”

“…It should also be emphasized that another research group [15] uses apparatus of this type as well. Moreover, the speeds of sound obtained by the use of the sing-around apparatus are useful for the calculation of the thermodynamic values (equation (6) and the next) only when the measurements in the non-dispersive region are made.…”

“…the calculations were taken from the previous work of one of us [6] (an interpolation procedure by the use of the molar isobaric heat capacity excess function C E p ðxÞ). We must also point out here that, unfortunately, values of the speed of sound and density were not determined exactly at the same composition.…”

“…This paper is part of a continuing study of (1-butanol + isomeric butanediols) systems aimed at gaining a better understanding of association in these hydrogen-bonded systems [1][2][3][4][5][6]. Especially, the placement examination of hydroxyl groups in the isomeric butanediol molecules on the physicochemical properties of above-mentioned systems is interesting.…”

The effect of temperature and pressure on acoustic and thermodynamic properties of 1,4-butanediol. The comparison with 1,2-, and 1,3-butanediols

“…Successive integration over pressure yields q(p, T) and c p (p, T) surfaces within the range of the experimental speed of sound data u(p, T). In this study, the temperature dependence of the isobaric heat capacity of 1,4BU at atmospheric pressure, reported previously [28], was used as a reference isobar. In the case of density, the results obtained in this work were used (as q(T, p 0 ) function with coefficients taken from table 5).…”