Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Vapor Pressures and Vaporization Enthalpies of the n-Alkanes from C31 to C38 at T = 298.15 K by Correlation Gas Chromatography

Chickos, J. S.[James S.], Hanshaw, W.[William]
J. Chem. Eng. Data 2004, 49, 3, 620-630
ABSTRACT
The temperature dependence of gas-chromatographic retention times for hentriacontane to octatriacontane is reported. These data are used in combination with other literature values to evaluate the vaporization enthalpies and vapor pressures of these n-alkanes from T = 298.15 to 575 K. The vapor pressure and vaporization enthalpy results obtained are compared with existing literature data where possible and found to be internally consistent. The vaporization enthalpies and vapor pressures obtained for the n-alkanes are also tested directly and through the use of thermochemical cycles using literature values for several polyaromatic hydrocarbons. Sublimation enthalpies are also calculated for hentriacontane to octatriacontane by combining vaporization enthalpies with temperature adjusted fusion enthalpies.
Compounds
# Formula Name
1 C31H64 hentriacontane
2 C32H66 dotriacontane
3 C33H68 tritriacontane
4 C34H70 tetratriacontane
5 C35H72 pentatriacontane
6 C36H74 hexatriacontane
7 C37H76 heptatriacontane
8 C38H78 octatriacontane
9 C24H18 1,3,5-triphenylbenzene
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 1
  • POMD
  • 1
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 29
  • POMD
  • 2
  • Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 1
  • POMD
  • 2
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 29
  • POMD
  • 3
  • Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 1
  • POMD
  • 3
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 29
  • POMD
  • 4
  • Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 1
  • POMD
  • 4
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 29
  • POMD
  • 5
  • Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 1
  • POMD
  • 5
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 29
  • POMD
  • 6
  • Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 1
  • POMD
  • 6
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 29
  • POMD
  • 7
  • Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 1
  • POMD
  • 7
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 29
  • POMD
  • 8
  • Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 1
  • POMD
  • 8
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • OTHER
  • 29
  • POMD
  • 9
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal
  • Crystal
  • Liquid
  • Gas
  • DSC
  • 1