Thermodynamic and Acoustic Properties of Binary Mixtures of Ethers. 2. Diisopropyl Ether with Arylamines at (303.15, 313.15, and 323.15) K and Application of ERAS Model to Aniline Mixtures with Diisopropyl Ether and Oxolane

Densities, ρ, and speeds of sound, u, of binary mixtures formed by aniline or N-methylaniline or N-ethylaniline with diisopropyl ether (DIPE) have been measured over the entire range of composition at a temperature of (303.15, 313.15, and 323.15) K and atmospheric pressure. The ρ and u values were used to calculate isentropic compressibilities, κS, excess molar volumes, V m E, and excess isentropic compressibilities κS E. The results have been used to investigate molecular interactions and structural effects in these mixtures. The speed of sound u in present mixtures has been estimated using several theoretical models to determine their relative predicting ability in terms of pure component properties. The ERAS model is applied to study V m E for DIPE−aniline and oxolane−aniline mixtures at (303.15, 313.15, and 323.15) K. The ERAS model represents qualitatively very large negative V m E data.