Thermodynamic study of alkane-α,ω-diamines - evidence of odd-even pattern of sublimation properties

0440781 - FZÚ 2015 RIV NL eng J - Journal Article
Fulem, Michal - Růžička, K. - Červinka, C. - Bazyleva, A. - Della Gatta, G.
Thermodynamic study of alkane-α,ω-diamines - evidence of odd-even pattern of sublimation properties.
Fluid Phase Equilibria. Roč. 371, Jun (2014), s. 93-105. ISSN 0378-3812. E-ISSN 1879-0224
Institutional support: RVO:68378271
Keywords : alkane-diamines * odd–even effect * vapor pressure * sublimation and vaporization thermodynamic properties * statistical thermodynamics
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.200, year: 2014

Calculated ideal-gas heat capacities and experimental data for vapor pressure, condensed phase heatcapacities, and calorimetric vaporization enthalpies of alkane-diamines, NH2-(CH2)n-NH2(2≤n≤8), were treated simultaneously to obtain a consistent thermodynamic description. Vapor pressures were measured using the static method in the temperature range from 233 to 314 K. The thermodynamic properties for liquid–vapor equilibrium display a linear dependence on number of methylene groups n while the sublimation thermodynamic properties show an evident odd–even effect with higher values for even members of a homologous series. Based on the observed trends, the correlations allowing the prediction of the thermodynamic properties for the crystal–vapor and liquid–vapor equilibria and crystalline and ideal-gas heat capacities within the homologous series are suggested.
Permanent Link: http://hdl.handle.net/11104/0243862