ABSTRACT

Vapor and sublimation pressures of three n-alkanes C20, C24, and C28 have been determined using a modified gas saturation method. The obtained pressure values range from 10-5 Pa to 5.5 Pa. From the temperature dependence of the vapor pressures, the molar enthalpies of vaporization and sublimation at the mean temperature of the experimental range were derived from the Clausius-Clapeyron equation. From these results, the standard enthalpies of vaporization and sublimation at T ) 298.15 K were calculated.

Compounds

#	Formula	Name
1	C20H42	eicosane
2	C24H50	tetracosane
3	C28H58	octacosane

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	Phase	Method	#Points
POMD	1	Vapor or sublimation pressure, kPa ; Crystal 2	Temperature, K; Crystal 2	Crystal 2 Gas	TRANSPIR:UFactor:2	4
POMD	1	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Transpiration method	6
POMD	2	Vapor or sublimation pressure, kPa ; Crystal 1	Temperature, K; Crystal 1	Crystal 1 Gas	TRANSPIR:UFactor:0.5	1
POMD	2	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Transpiration method	3
POMD	2	Vapor or sublimation pressure, kPa ; Crystal 2	Temperature, K; Crystal 2	Crystal 2 Gas	TRANSPIR:UFactor:0.5	3
POMD	3	Vapor or sublimation pressure, kPa ; Crystal 2	Temperature, K; Crystal 2	Crystal 2 Gas	TRANSPIR:UFactor:0.1	3
POMD	3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid	Liquid Gas	Transpiration method	5

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

Vapor and Sublimation Pressures of Three Normal Alkanes: C20, C24, and C28

Razzouk, A.[Antonio], Naccoul, R. A.[Ramy Abou], Mokbel, I.[Ilham], Saab, J.[Joseph], Jose, J.[Jacques]

ABSTRACT