Excess enthalpies of binary solvent mixtures of N-methylacetamide with aliphatic alcohols |
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Authors: | Liisa Pikkarainen |
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Affiliation: | (1) Department of Chemistry, University of Oulu, SF-90570 Oulu, Finland |
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Abstract: | The molar excess enthalpies HmE of binary solvent mixtures of N-methylacetamide with methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, and t-butanol have been measured with a flow microcalorimeter at 40°C. The excess enthalpies are negative for methanol and positive for the other alcohols over the whole composition range, except for t-butanol which exhibits a sigmoid curve with a deep minimum at low mole fractions of the amide. The values for the primary alcohols increase in the order methanol < ethanol < 1-propanol < 1-butanol. The partial molar excess enthalpies have also been evaluated. Intermolecular interactions in these mixtures are discussed through comparison of the results with those for the corresponding binary mixtures of N,N-dimethylacetamide. |
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Keywords: | Alcohols N-methylacetamide enthalpy of mixing |
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