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Abstract
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The densities, 휌 and speeds of sound, u were measured for pure and the binary mixtures of monoethanolamine (MEA)+1-alcohols (1-propanol, 1-butanol, 1-pentanol and 1-hexanol) at (298.15–318.15) K and the whole composition range. From the experimental data excess molar volumes, VE m, excess partial molar volumes, V E i , excess thermal expansion coefcients, 훼E, isothermal coefcients of excess molar enthalpies, (휕HE m∕휕P)T,x, isentropic compressibility, ks and excess isentropic compressibilities, kE s have been calculated for the binary systems. The excess molar volume and excess isentropic compressibility were correlated with the Redlich–Kister polynomial equation. The excess molar volumes and excess isentropic compressibilities were negative for all binary systems, except, for the system of MEA+1-hexanol in which excess molar volume showed a sigmoid shape. The efect of temperature and chain length of alcohol on the excess molar volumes, VE m, and excess isentropic compressibilities, kE s , are discussed in terms of molecular interactions between unlike molecules. The Extended Real Associated Solution model was applied to correlate the excess molar volumes.
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