Abstract
Experimental data of excess molar enthalpy (H Em ) and excess molar heat capacity (C Epm ) of binary mixtures containing (1-heptanol or 1-octanol)+(diethylamine or s-butylamine) have been determined as a function of composition at 298.15 K and at 0.1 MPa using a modified 1455 Parr solution calorimeter. The excess molar enthalpy data are negative and show parabolic format over the whole composition range; however, the excess molar heat capacity values, whose curves show a S-shape, are positive in the 0.0 to 0.7 molar fraction range and negative between the molar fraction values 0.7 to 1.0. The applicability of the ERAS-model to correlate the excess molar enthalpy data was tested. The calculated data values are in good agreement with the experimental ones. The experimental behavior of H Em is interpreted in terms of specific interactions between 1-alkanol and amine molecules.
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Checoni, R.F., Francesconi, A.Z. Measurements of excess molar enthalpy and excess molar heat capacity of (1-heptanol or 1-octanol)+(diethylamine or s-butylamine) mixtures at 298.15 K and 0.1 MPa. J Therm Anal Calorim 97, 747–753 (2009). https://doi.org/10.1007/s10973-008-9602-1
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DOI: https://doi.org/10.1007/s10973-008-9602-1