Volumetric Properties and Refractive Indices for Binary Mixtures of 1-Propyronitrile-3-hexylimidazolium Bromide + Ethanol at Temperatures from 293.15 to 323.15 K

Densities and refractive indices have been measured for binary mixtures of
1-propyronitrile-3-hexylimidazolium bromide + ethanol in the temperature range 293.15–
323.15 K. From the experimental data the excess molar volume V E, refractive index deviation
�nD, and the coefficient of thermal expansion α were calculated and fitted to fifth- and
third-order Redlich–Kister type equations, respectively. Using the measured densities, the
apparent molar volumes (Vφ), limiting apparent molar volumes (V 0
φ ) and limiting apparent
molar expansivities (E0
φ) were also determined and the details are discussed.