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Thermodynamic study of selected monoterpenes III

Authors
Journal
The Journal of Chemical Thermodynamics
0021-9614
Publisher
Elsevier
Identifiers
DOI: 10.1016/j.jct.2014.04.022
Keywords
  • Monoterpenes
  • Vapor Pressure
  • Heat Capacity
  • Ideal-Gas Thermodynamic Properties
  • Vaporization And Sublimation Enthalpy
Disciplines
  • Ecology
  • Geography
  • Physics

Abstract

Abstract A thermodynamic study of selected monoterpenes, (−)-trans-pinane, (+)-Δ-carene, eucalyptol, (+)-limonene, and (−)-limonene, is presented in this work. The vapor pressure measurements were performed using the static method over the environmentally important temperature range (238 to 308)K. Liquid heat capacities were measured by Tian–Calvet calorimetry in the temperature interval (258 to 355)K. The phase behavior was investigated by differential scanning calorimetry (DSC) from T=183K. The thermodynamic properties in the ideal-gas state were calculated by combining statistical thermodynamic and density functional theory (DFT) calculations. Calculated ideal-gas heat capacities and experimental data for vapor pressures and condensed phase heat capacities were treated simultaneously to obtain a consistent thermodynamic description.

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