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Critical Behavior of Binary Mixtures of Nitrobenzene + n-Undecane and Nitrobenzene + n-Dodecane

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Abstract

Turbidities and isobaric heat capacities per unit volume, in a wide temperature range, have been measured for critical binary solutions of {nitrobenzene + n-undecane} and {nitrobenzene + n-dodecane}. The critical exponents and the system-dependent critical amplitudes were deduced. The non-critical and the critical-fluctuation induced contributions to the background heat capacities were determined. We also obtained the coupling constant \( \bar{u} \) by analyzing the coexistence curve data with crossover theory. These parameters were used to test some universal amplitude ratios and together with the coexistence-curve data to test the complete scaling theory. It is shown that the contribution from heat capacity plays an important role in describing the asymmetric criticality of the coexistence curve.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Projects 20973061, 21073063, and 21173080).

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  1. Yun-Tao Lei

    Present address: Department of Basic Science, China Pharmaceutical University, Nanjing, 210009, Jiangsu, China

Authors and Affiliations

  1. School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China

    Tian-Xiang Yin, Mei-Jun Huang, Zhi-Yun Chen, Xue-Qin An & Wei-Guo Shen

  2. Department of Chemistry, Lanzhou University, Lanzhou, 730000, Gansu, China

    Yun-Tao Lei & Wei-Guo Shen

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  1. Tian-Xiang Yin
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Yin, TX., Lei, YT., Huang, MJ. et al. Critical Behavior of Binary Mixtures of Nitrobenzene + n-Undecane and Nitrobenzene + n-Dodecane. J Solution Chem 41, 1866–1888 (2012). https://doi.org/10.1007/s10953-012-9907-3

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