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Thermodynamic properties of binary mixtures: Hexamethylphosphoric triamide + a polar liquid at 25°C

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Abstract

Excess enthalpies H Em excess isobaric heat capacities C Ep,m′ , densities, and speeds of sound of hexamethylphosphoric triamide (HMPA)+acetonitrile (AN), + N,N-dimethylformamide (DMF), and + dimethylsulfoxide (DMSO) were measured at 25degrC. H Em =−1200 J-mol−1 for HMPA + AN, −180 J-mol−1 for HMPA + DMF, and 75 J-mol−1 for HMPA + DMSO C Ep,m is positive and considerably larger than C Ev,m′ . V Em for HMPA + DMSO was small and changed sign from negative to positive around HMPA mole fraction x=0.6. V Em for the other two mixtures were negative. The excess compressibilities, K Em for the other two mixtures were negative. The excess compressibilities, K ES and K ET were similar to V Em

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558, Japan

    Katsutoshi Tamura

  2. Department of Applied Chemistry, Osaka Institute of Technology, 5-16-1, Ohmiya Asahi-ku, Osaka 534, Japan

    Yoshimasa Akagi

Authors
  1. Katsutoshi Tamura
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  2. Sachio Murakami
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  3. Yoshimasa Akagi
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  4. Masato Fukumori
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  5. Yoshikane Kawasaki
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Tamura, K., Murakami, S., Akagi, Y. et al. Thermodynamic properties of binary mixtures: Hexamethylphosphoric triamide + a polar liquid at 25°C. J Solution Chem 23, 263–273 (1994). https://doi.org/10.1007/BF00973550

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  • DOI: https://doi.org/10.1007/BF00973550

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