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Excess Molar Volumes, Excess Molar Enthalpies, and Excess Isentropic Compressibilities of Binary Mixtures Containing N-Methyl-2-Pyrrolidone and Isomeric Xylenes at 308.15 K

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Abstract

Excess molar volumes, excess molar enthalpies and speeds of sound of 1-methyl pyrrolidin-2-one + o- or m- or p-xylene binary mixtures have been measured over the entire composition range at 308.15 K. The speed of sound data were used to determine the excess isentropic compressibilities. It is observed that while the values of the excess molar enthalpies for the investigated mixtures are positive, the values of the excess molar volumes and excess isentropic compressibilities are negative over the entire composition range. The measured thermodynamic data have been analyzed in terms of Graph, Prigogine–Flory–Patterson, and the Sanchez and Lacombe theories. It is observed that Graph theory correctly predicts the signs and magnitudes of the excess molar volumes, excess molar enthalpies, and excess isentropic compressibilities of the studied mixtures. However, the excess molar volumes, excess molar enthalpies and excess isentropic compressibilities predicted by Prigogine–Flory–Patterson and Sanchez and Lacombe theories are of same sign.

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Acknowledgments

The authors are grateful to the Head, Chemistry Department and authorities of M.D. University, Rohtak, for providing research facilities.

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Authors and Affiliations

  1. Department of Chemistry, Maharshi Dayanand University, Rohtak, 124001, India

    Y. Chhikara & V. K. Sharma

  2. Department of Chemistry, A.I.J.H.M. College, Rohtak, 124001, Haryana, India

    J. S. Yadav

  3. P.D.M. College of Engineering for Women, Bhadurgarh, Haryana, India

    D. Sharma

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  1. Y. Chhikara
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  2. J. S. Yadav
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  3. D. Sharma
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  4. V. K. Sharma
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Correspondence to V. K. Sharma.

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Chhikara, Y., Yadav, J.S., Sharma, D. et al. Excess Molar Volumes, Excess Molar Enthalpies, and Excess Isentropic Compressibilities of Binary Mixtures Containing N-Methyl-2-Pyrrolidone and Isomeric Xylenes at 308.15 K. J Solution Chem 41, 1696–1712 (2012). https://doi.org/10.1007/s10953-012-9909-1

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