RT info:eu-repo/semantics/article
T1 Thermodynamics of amide + amine mixtures. 5. Excess molar enthalpies of N,N-dimethylformamide or N,N-dimethylacetamide + N-propylpropan-1-amine, + N-butylbutan-1-amine, + butan-1-amine, or + hexan-1-amine systems at 298.15 K. Application of the ERAS model
A1 Hevia de los Mozos, Luis Fernando
A1 Ballerat-Busserolles, Karine
A1 Coulier, Yohann
A1 Coxam, Jean-Yves
A1 González López, Juan Antonio Mariano
A1 García de la Fuente, Isaías Laudelino
A1 Cobos Hernández, José Carlos
K1 Termodinámica
K1 Amides
K1 Amines
K1 Excess enthalpy
K1 ERAS
K1 Physical interactions
K1 2213 Termodinámica
K1 2210.21 Equilibrio de Fases
K1 2210.30 Soluciones
AB Excess molar enthalpies, HEm, over the whole composition range have been determined for the liquid mixtures N,N-dimethylformamide (DMF) or N,N-dimethylacetamide (DMA) + butan-1-amine (BA), or + hexan-1-amine (HxA), or + N-propylpropan-1-amine (DPA), or N-butylbutan-1-amine (DBA) at 298.15 K and at 0.1 MPa using a BT2.15 calorimeter from Setaram adapted to work in dynamic mode at constant temperature and pressure. All the HEm values are positive, indicating that interactions between like molecules are predominant. The replacement of DMF by DMA in systems with a given amine leads to lower HEm results, which have been ascribed to stronger amide-amide interactions in DMF mixtures. The replacement of HxA by DPA in systems with a given amide leads to slightly higher HEm values, as interactions between unlike molecules are weaker for the latter. Structural effects in the investigated solutions are also present, since the corresponding excess molar volumes (VEm), previously determined, are negative or slightly positive. The systems have been characterized in terms of the ERAS model reporting the interaction parameters. The model correctly describes both HEm and VEm. The application of the model suggests that, in the systems under study, solvation effects are of minor importance and that physical interactions are dominant.
PB Elsevier B.V.
SN 0378-3812
YR 2019
FD 2019
LK http://uvadoc.uva.es/handle/10324/38598
UL http://uvadoc.uva.es/handle/10324/38598
LA eng
NO Fluid Phase Equilibria 502 (2019) Article number 112283
NO Producción Científica
DS UVaDOC
RD 22-nov-2024