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Heat capacities and thermodynamic properties of chrysanthemic acid

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Abstract

The heat capacities of chrysanthemic acid in the temperature range from 80 to 400 K were measured with a precise automatic adiabatic calorimeter. The chrysanthemic acid sample was prepared with the purity of 0.9855 mole fraction. A solid-liquid fusion phase transition was observed in the experimental temperature range. The melting point, T m, enthalpy and entropy of fusion, Δfus H m, Δfus S m, were determined to be 390.741±0.002 K, 14.51±0.13 kJ mol-1, 37.13±0.34 J mol-1 K-1, respectively. The thermodynamic functions of chrysanthemic acid, H (T)-H(298.15), S (T)-S(298.15) and G (T)-G (298.15) were reported with a temperature interval of 5 K. The TG analysis under the heating rate of 10 K min-1 confirmed that the thermal decomposition of the sample starts at ca. 410 K and terminates at ca. 471 K. The maximum decomposition rate was obtained at 466 K. The purity of the sample was determined by a fractional melting method.

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Authors and Affiliations

  1. School of Petrochemical Engineering, Shenyang University of Technology, Box 33, Guanghua Street number 30, Liaoyang, 111003, P.R. China

    B. Xue & J.-Y. Wang

  2. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Science, P.O. Box 110, Dalian, 116023, P.R. China

    Z.-C. Tan, S.-W. Lu & S.-H. Meng

Authors
  1. B. Xue
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  2. J.-Y. Wang
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  3. Z.-C. Tan
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  4. S.-W. Lu
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  5. S.-H. Meng
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Correspondence to B. Xue.

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Xue, B., Wang, JY., Tan, ZC. et al. Heat capacities and thermodynamic properties of chrysanthemic acid. Journal of Thermal Analysis and Calorimetry 76, 965–973 (2004). https://doi.org/10.1023/B:JTAN.0000032282.04071.f1

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  • DOI: https://doi.org/10.1023/B:JTAN.0000032282.04071.f1

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