This review deals with the investigation of the ultrasonic velocity in organic liquids on the saturation curve and with analysis of the results obtained at the Kursk State University -KGU (before that, Kursk State Pedagogical Institute -KGPI) during the period from 1969 to the present day. Much attention is given to the description of the procedure of measurement of the sound velocity by the pulse-phase method developed at the Laboratory of Molecular Acoustics of the KGU and to the estimation of measurement errors. The data on the sound velocity along the saturation curve in a wide temperature range for three classes of organic liquids (saturated hydrocarbons, aliphatic alcohols, and aromatic hydrocarbons) are given in the form of tables. Characteristic features of the behavior of the sound velocity and adiabatic compressibility of liquid in the vicinity of the critical point are investigated, and the possibility of using the acoustic data for the calculation of the thermodynamic properties of liquids is studied.

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We present results of the experimental measurements of the isobaric heat capacity for 1-bromohexane, 1-bromoheptane, 1-bromooctane, 1-bromononane, 1-bromodecane, 1-bromoundecane, 1-bromododecane and 1-bromo-tetradecane at normal pressure and the speed of sound and the density for 1-bromotetradecane within the temperature range 298.15-423.15 K. These data on the isobaric heat capacity and the literature-based reference data for the density and the speed of sound were used to calculate the isothermal compressibility and the inverse reduced fluctuations. Based on the comparison of the results for pure n-alkanes and α, ω-dibromoalkanes, we discuss the influence of bromine atom on the volume fluctuations.

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