Measurements of excess molar enthalpy and excess molar heat capacity of (1-heptanol or 1-octanol)+(diethylamine or <Emphasis Type="Italic">s</Emphasis>-butylamine) mixtures at 298.15 K and 0.1 MPa |
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Authors: | R F Checoni A Z Francesconi |
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Institution: | 1.Departamento de Engenharia de Sistemas Químicos, Faculdade de Engenharia Química,Universidade Estadual de Campinas,Unicamp,Brazil |
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Abstract: | Experimental data of excess molar enthalpy (H
mE) and excess molar heat capacity (C
pmE) 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
mE is interpreted in terms of specific interactions between 1-alkanol and amine molecules. |
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Keywords: | |
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