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The development of the molecular theory of the liquid state of matter contributes to the solution of applied problems in many branches of science and technology. However, the molecular theory of the liquid state of matter lags far behind in its development from a similar theory of gases and solids. Acoustic studies of binary solutions in a wide range of concentration and temperature can make a great contribution to the study of the liquid state. This is important both from the point of view of the development of the molecular theory of the liquid state of matter, and with the constantly growing practical application of mixtures in a number of industries. We have investigated the hyperacoustic and thermodynamic parameters in solutions of aniline + nitrobenzene at various concentrations and temperatures using the Mandelstam - Brillouin light scattering spectra. It was found that in aniline + nitrobenzene solutions, with an increase in the proportion of aniline in the mixture, the hypersound velocity as a function of viscosity increases. In thermal studies, this relationship is also preserved. As the temperature rises, the viscosity of the liquid decreases and, accordingly, the speed and frequency of hyper sound decreases, and the adiabatic compressibility increases. The change in these values can be explained by a change in the structure and intermolecular interaction in the studied solutions with a change in the state parameters.
Hyperacoustics, Hypersound, Dispersion, Isotropic Solution, Mandelstam-Brillouin, Temperature, Viscosity, Adiabatic Compressibility Frequency
