Densities, Speeds of Sound and Refractive Indices for Binary Mixtures of Acetonitrile plus Alkyl-Substituted Butylbenzenes: Experimental and Modeling Study

The experimental data of densities, rho, speeds of sound, u, and refractive indices, nD, are reported for three binary mixtures of acetonitrile + aromatic hydrocarbons, namely: acetonitrile + n-butylbenzene, acetonitrile + sec-butylbenzene and acetonitrile + tert-butylbenzene, respectively, at T = (298.15, 303.15, 308.15, 313.15, and 318.15) K, on the entire composition ranges and under atmospheric pressure, p = 0.1 MPa. The values obtained from experimental measurements have been correlated by the Jouyban-Acree model with good accuracy. The excess molar volumes, VmE\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${V}_{m}<^>{E}$$\end{document}, excess speeds of sound, uE, excess isentropic compressibilities, kappa S\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\kappa }_{S}$$\end{document}, excess molar isentropic compressibilities, KS,mE\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${K}_{S,m}<^>{E}$$\end{document}, refractive index deviations, Delta nD, and excess molar refractions, RmE\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${R}_{m}<^>{E}$$\end{document}, have been calculated from experimental data. For each of the studied mixtures, the excess or deviation properties have been correlated with the Redlich-Kister polynomial equation and the coefficients of correlations were reported. In this manuscript, Perturbed Chain Statistical Associating Fluid Theory Equation of State (PC-SAFT EoS) was used for modeling the density as predictive approach. On the other hand, PC-SAFT + two models were used for calculate the speed of sound of binary mixtures, and PC-SAFT + four mixing rules were used for compute the refractive index of binary mixtures.