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Excess molar enthalpies for ternary mixtures containing [emim][BF4], cyclic amides and cyclic ketones

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Abstract

The excess molar enthalpies, \( H_{{\text{123}}}^{\text{E}} \), data of ternary 1-ethyl-3-methylimidazolium tetrafluoroborate (1) + pyrrolidin-2-one or 1-methyl pyrrolidin-2-one (2) + cyclopentanone or cyclohexanone (3) mixtures have been measured at 298.15 K and 0.1 M Pa using microdifferential scanning calorimeter. The \( H_{{\text{123}}}^{\text{E}} \) values of [emim][BF4] (1) + 2-Py (2) + cyclopentanone or cyclohexanone (3) are endothermic, while those for [emim][BF4] (1) + NMP (2) + cyclopentanone or cyclohexanone (3) mixtures are negative over entire composition of x 1 and x 2. The observed data of \( H_{{\text{123}}}^{\text{E}} \) have been investigated in terms of Graph and Prigogine–Flory–Patterson theories. The results indicate that \( H_{{\text{123}}}^{\text{E}} \) values estimated by Graph theory compare well with experimental values.

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Acknowledgements

Jyoti Kataria is grateful to UGC, 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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  1. Department of Chemistry, M. D. University, Rohtak, 124001, Haryana, India

    V. K. Sharma, J. Kataria & S. Solanki

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Sharma, V.K., Kataria, J. & Solanki, S. Excess molar enthalpies for ternary mixtures containing [emim][BF4], cyclic amides and cyclic ketones. J Therm Anal Calorim 123, 1571–1582 (2016). https://doi.org/10.1007/s10973-015-5033-y

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