Measurement of the ratio of isothermal compressibility to the square of isobaric expansivity of acetonitrile by Rayleigh light scattering

The ratio of isothermal compressibility to the square of isobaric expansivi ty (K-r/a(p)(2)) was determined via Rayleigh light scattering experiments f or liquid acetonitrile as a function of temperature. The data obtained from light scattering measurements are in good agreement with those calculated from Strobridge equation of state of acetonitrile. The polarizable dipolar hard sphere model potential parameters obtained from optically measured dat a via the perturbation theory show excellent agreement with those obtained by the help of phase equilibrium data of acetonitrile.