Vaporization enthalpies of self-associated aromatic compounds at 298.15 K: A review of existing data and the features of heat capacity correction. Part I. Phenols

• Published in: Thermochimica acta 2023-03, Vol.721, p.179455, Article 179455
• Main Authors: Bolmatenkov, Dmitrii N., Yagofarov, Mikhail I., Sokolov, Andrey A., Solomonov, Boris N.
• Format: Article
• Language: English
• Subjects: Fusion enthalpy; Heat capacity; Hess's law; Kirchhoff's law; Phenols; Sublimation enthalpy; Vaporization enthalpy
• ISSN: 0040-6031; 1872-762X
• DOI: 10.1016/j.tca.2023.179455

•Condensed state heat capacities of 3 phenols were measured.•Ideal gas phase heat capacities of 10 phenols were computed.•Mutual agreement between vaporization, sublimation, and fusion enthalpies was analyzed.•Vaporization enthalpies of 39 phenols at 298.15 K were critically analyzed.•Approach for heat capacity correction of their vaporization enthalpies was proposed. Vaporization, sublimation and fusion enthalpies of 39 phenol derivatives were thoroughly analyzed using Kirchhoff's and Hess's laws of Thermochemistry to derive the reliable ΔlgH°(298.15 K) values. During the analysis, the correction for non-ideality for the high-temperature vaporization enthalpies was performed. The crystal, liquid and gas heat capacities available from the literature were complemented with the additional experimental measurements of the condensed phases and the computations of the ideal gas properties. Analyzing the available information, we proposed a simple approach for the estimation of the temperature dependence of the vaporization enthalpy of phenol derivatives that showed high accuracy for compounds of various structure.