Abstract
Binary liquid mixtures of acetic acid+ethanol, n-propanol+hexane, benzene+acetone, n-propanol+toluene, hexane+CCl4 and methanol+water have been studied through Brillouin scattering experiments performed at room temperature (T=20 degrees C). The samples were contained in a precision home-made high-pressure cell and the hydrostatic pressure P acting on the samples was varied from 1 to 825 bar in steps of about 100 bar each. The hypersonic sound velocities Vs were determined as a function of externally applied pressure P from the observed Brillouin shifts. The experimentally determined pressure dependence of sound velocity was found to exhibit a Vs(P)=A0+A1P+A2P2 type of behaviour.
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