Abstract
Excess molar enthalpies, \( H_{123}^{\text{E}} \) of ternary 1-ethyl-3-methylimidazolium tetrafluoroborate (1) + 2-methyl aniline (2) + aniline or N-methyl aniline (3); 1-ethyl-3-methylimidazolium tetrafluoroborate (1) + water (2) + formamide or N,N-dimethyl formamide (3) and H E of 2-methyl aniline (1) + aniline or N-methyl aniline (2); 1-ethyl-3-methylimidazolium tetrafluoroborate (1) + formamide (2) mixtures, have been measured at 298.15 K. The excess molar enthalpies, \( H_{123}^{\text{E}} \), are negative for 1-ethyl-3-methylimidazolium tetrafluoroborate (1) + 2-methyl aniline (2) + aniline or N-methyl aniline (3) mixtures and are positive for 1-ethyl-3-methylimidazolium tetrafluoroborate (1) + water (2) + formamide (3) mixture over entire composition of (1) and (2) components. However, the magnitude and sign of \( H_{123}^{\text{E}} \) value for 1-ethyl-3-methylimidazolium tetrafluoroborate (1) + water (2) + N,N-dimethyl formamide (3) mixture vary by the relative composition of the constituent molecules. The \( H_{123}^{\text{E}} \) and H E data have also been tested in terms of Graph and Prigogine–Flory–Patterson theories.
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Subhash Solanki is grateful to CSIR, New Delhi, India for the award of SRF. The authors are also grateful to the Head of Chemistry Department and authorities of M. D. University, Rohtak, for providing research facilities.
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Sharma, V.K., Solanki, S. & Bhagour, S. Excess molar enthalpies of binary and ternary liquid mixtures. J Therm Anal Calorim 119, 1293–1302 (2015). https://doi.org/10.1007/s10973-014-4286-1
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DOI: https://doi.org/10.1007/s10973-014-4286-1