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Fast method for the experimental determination of vaporization enthalpy by differential scanning calorimetry

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Abstract

A simple method is proposed to estimate the vaporization enthalpy of the palmitic acid (hexadecanoic acid) at its normal boiling temperature. Differential scanning calorimetry (DSC) was the technique used to directly measure these thermodynamic properties. The advantages of this method are its speed and small amount of sample required. In order to avoid evaporation and to ensure equilibrium conditions, the experiments were carried out including a-alumina in contact with the fatty acid. The effect of the alumina concentration is discussed. The obtained experimental data (Tbp=625.4±0.5 K, Dvap H=237.6±5.9 J g-1) is compared with that obtained by using thermodynamic equations.

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Authors and Affiliations

  1. Departamento de Energía, E.T.S. de Ingenieros de Minas de Oviedo, Universidad de Oviedo, 33004, Oviedo, Spain

    Fidel. O. Cedeńo

  2. Departamento de Energía, E.T.S. de Ingenieros Industriales de Gijón, Universidad de Oviedo, 33204, Gijón, Spain

    Maria. M. Prieto

  3. Departamento de Química Orgánica e Inorgánica, Facultad de Química, Universidad de Oviedo, 33006, Oviedo, Spain

    Aranzazu Espina & Jose. R. García

Authors
  1. Fidel. O. Cedeńo
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  2. Maria. M. Prieto
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  3. Aranzazu Espina
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  4. Jose. R. García
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Cedeńo, F.O., Prieto, M.M., Espina, A. et al. Fast method for the experimental determination of vaporization enthalpy by differential scanning calorimetry. Journal of Thermal Analysis and Calorimetry 73, 775–781 (2003). https://doi.org/10.1023/A:1025878313429

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  • DOI: https://doi.org/10.1023/A:1025878313429

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