From these results, the excess molar volumes, viscosity deviations, deviations in molar refraction, deviations in speed of sound, and isentropic compressibility have been derived.
Molar Refraction. Refractive indices have been used for the calculation of molar refraction ([R.sub.m]) that is obtained by using Lorentz-Lorenz equation .
Deviation in molar refraction ([DELTA]R) is calculated by the following equation:
Fromthese results the excess molar volumes, viscosity deviations, and deviations in molar refraction and isentropic compressibility have been derived.
where [n.sub.D] refers to refractive index, [R.sub.m] is molar refraction of the mixture, [R.sub.i] is molar refraction of the ith component, and [PHI] is ideal state volume fraction.
The deviations in molar refraction are shown in Figure 3.