Thermodynamics Research Center / ThermoML | Thermochimica Acta

ABSTRACT

Densities n and speeds of sound u, of binary mixtures formed by N,N-dimethylaniline (DMA) or N,N-diethylaniline (DEA) with diisopropyl ether (DIPE) or oxolane 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 poundsl and u values were used to calculate isentropic compressibilities kS, Rao's molar sound functions R, intermolecular free lengths Lf, specific acoustic impedances Z, excess molar volumes , excess isentropic compressibilities , excess intermolecular free lengths and excess specific acoustic impedances ZE. The results have been used to investigate molecular interactions and structural effects in these mixtures. The speeds of sound in present mixtures have been estimated using several empirical and theoretical models to determine their relative predicting ability in terms of pure component properties.