Heat capacity of 1-pentylamine and 1-hexylamine: Experimental determination and modeling through a two-state association model (TSAM)

Paloma Navia (1, 2) , David Bessieres (2) , Frédéric Plantier (2)

1 Departamento de Física Aplicada
2 LFCR - Laboratoire des Fluides Complexes et leurs Réservoirs

We report new experimental data of heat capacity of two primary amines, namely 1-pentylamine and 1-hexylamine over wide ranges of pressure [0.1-60 (MPa)] and temperature [303.15-403.15 (K)]. The experimental behaviour of the heat capacity versus temperature and pressure is analyzed. An attempt to rationalize this behaviour is performed through a two-state association model (TSAM), which allows expressing the specific effect due to association at molecular level. It appears that the heat capacity trend versus temperature is clearly governed by auto-association between amines molecules. The physical meaningful of the (TSAM) model parameters highlights the capability of this approach to capture the heat capacity behavior of the amines.

Mots clés: 1-Hexylamine; 1-Pentylamine; Heat capacity; Two-state association model (TSAM)

Domaines: Chimie-Physique [physics.chem-ph]

Paloma Navia, David Bessieres, Frédéric Plantier. Heat capacity of 1-pentylamine and 1-hexylamine: Experimental determination and modeling through a two-state association model (TSAM). Journal of Chemical Thermodynamics, 2013, 57, pp.367-371. ⟨10.1016/j.jct.2012.09.016⟩. ⟨hal-00830632⟩