DETERMINATION OF THE ADIABATIC COMPRESSIBILITY ꞵs OF A SERIES OF ALCOHOLS FROM THE VELOCITY OF HYPERSOUND AT DIFFERENT TEMPERATURES

Abstract

A great contribution to the study of the liquid state can be made by elucidating the nature of structural changes in the molecules of a liquid at various state parameters. Optical methods will give us the opportunity to obtain more complete information about the nature of structural changes in molecules. One of these methods is based on the study of the spectra of Mandelstam- Brillouin scattering of light. By investigating the Mandelstam - Brillouin scattering of light in liquids at various temperatures, one can obtain valuable information about adiabatic fluctuations. The main reason causing molecular scattering of light is fluctuations in dielectric constant. The purpose of this work is to determine the adiabatic compressibility of a number of alcohols from the spectra of Mandelstam-Brillouin light scattering and based on the hypersonic velocity and density at various temperatures. At high temperatures, the quantitative difference in hypersonic velocity and adiabatic compressibility in normal alcohols tends to decrease. In the case of an increase in temperature, we associate such a tendency with the destruction of the probability of the formation of H-bonds.