Vapor pressure and enthalpy of vaporization of linear aliphatic alkanediamines

► We measured vapor pressure of diamines H 2N–(CH 2) n –NH 2 with n = 3 to 12. ► Vaporization enthalpies at 298 K were derived. ► We examined consistency of new and available in the literature data. ► Enthalpies of vaporization show linear dependence on numbers n. ► Enthalpies of vaporization correl...

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Bibliographic Details
Published in:The Journal of chemical thermodynamics 2011-12, Vol.43 (12), p.1791-1799
Main Authors: Pozdeev, Vasiliy A., Verevkin, Sergey P.
Format: Article
Language:English
Subjects:
Aliphatic compounds
Alkanediamines
Alkanes
Chemical thermodynamics
Chemistry
Consistency
Correlation analysis
Elements, mineral and organic compounds
Enthalpy
Enthalpy of vaporization
Exact sciences and technology
General and physical chemistry
Kovats index
Thermodynamic properties
Transpiration
Transpiration method
Vapor pressure
Vaporization
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Summary:► We measured vapor pressure of diamines H 2N–(CH 2) n –NH 2 with n = 3 to 12. ► Vaporization enthalpies at 298 K were derived. ► We examined consistency of new and available in the literature data. ► Enthalpies of vaporization show linear dependence on numbers n. ► Enthalpies of vaporization correlate linearly with Kovat’s indices. Vapor pressures and the molar enthalpies of vaporization of the linear aliphatic alkanediamines H 2N–(CH 2) n –NH 2 with n = (3 to 12) have been determined using the transpiration method. A linear correlation of enthalpies of vaporization (at T = 298.15 K) of the alkanediamines with the number n and with the Kovat’s indices has been found, proving the internal consistency of the measured data.
ISSN:0021-9614
1096-3626
DOI:10.1016/j.jct.2011.06.008