Thermodynamic and acoustic properties of binary mixtures of oxolane with aniline and substituted anilines at 303.15, 313.15 and 323.15K

Speeds of sound u, isentropic compressibilities kappa(S), Rao's molar sound functions R, intermolecular free lengths L-f, specific acoustic impedances Z. excess molar volumes V-m(E), excess isentropic compressibilities kappa(E)(s), excess intermolecular free lengths L-f(E) and excess specific acoustic impedances Z(E), of three binary mixtures of oxolane (tetrahydrofuran) with aniline, N-methylaniline and N-ethylaniline have been reported over the entire range of composition at 303.15, 313.15 and 323.15K. The excess values have been fitted to Redlich-Kister polynomial equation. The results have been analyzed in terms of molecular interactions between oxolane and anilines. The speeds of sound in present binary mixtures have been estimated from various empirical and theoretical models. (C) 2010 Elsevier B.V. All rights reserved.