ABSTRACT

The vaporization enthalpies of a mixture of n-alkanes, aliphatic esters, and dialkyl phthalates are examined both by correlation gas chromatography and another commonly used gas chromatographic retention time technique according to the protocol described by Hamilton. The resulting vaporization enthalpies and vapor pressures at T/K = 298.15 are compared with respect to the functional groups present. Additionally, two compounds, docosane and ethyl octadecanoate, exhibited retention time coincidence over a T/K = 30 temperature range. These compounds have been examined by correlation gas chromatography to determine how this coincidence affects the thermochemical properties evaluated.

Compounds

#	Formula	Name
1	C10H10O4	dimethyl 1,2-benzenedicarboxylate
2	C12H14O4	diethyl phthalate
3	C16H22O4	dibutyl phthalate
4	C17H34O2	methyl hexadecanoate
5	C19H20O4	benzyl butyl 1,2-benzenedioate
6	C19H38O2	methyl octadecanoate
7	C20H40O2	ethyl octadecanoate
8	C20H42	eicosane
9	C21H42O2	methyl eicosanoate
10	C22H44O2	methyl heneicosanoate
11	C22H46	docosane
12	C24H38O4	bis(2-ethylhexyl) 1,2-benzenedicarboxylate
13	C24H38O4	dioctyl 1,2-benzenedicarboxylate
14	C24H50	tetracosane
15	C25H52	pentacosane
16	C26H54	hexacosane
17	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	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	1	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Correlation-gas chromatography	1
POMD	2	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	2	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Correlation-gas chromatography	1
POMD	3	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	3	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Correlation-gas chromatography	1
POMD	4	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	4	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Correlation-gas chromatography	1
POMD	5	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	5	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Correlation-gas chromatography	1
POMD	6	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	7	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	7	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Correlation-gas chromatography	1
POMD	8	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	8	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Correlation-gas chromatography	1
POMD	9	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	10	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	10	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Correlation-gas chromatography	1
POMD	11	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	11	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Correlation-gas chromatography	1
POMD	12	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	12	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Correlation-gas chromatography	1
POMD	13	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	13	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Correlation-gas chromatography	1
POMD	14	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	14	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Correlation-gas chromatography	1
POMD	15	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	15	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Correlation-gas chromatography	1
POMD	16	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	16	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Correlation-gas chromatography	1
POMD	17	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Chromatographic retention time	1
POMD	17	Molar enthalpy of vaporization or sublimation, kJ/mol ; Liquid	Temperature, K; Liquid	Liquid Gas	Correlation-gas chromatography	1

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

A Comparison of Results by Correlation Gas Chromatography with Another Gas Chromatographic Retention Time Technique. The Effects of Retention Time Coincidence on Vaporization Enthalpy and Vapor Pressure

Gobble, C., Chickos, J. S.

ABSTRACT