Excess properties and vapour pressure of 2-diethylaminoethylamine + cyclohexane

The vapour pressures of liquid (2-diethylaminoethylamine (2-DEEA) + cyclohexane) mixtures were measured by a static method between (T = 273.15 and T = 363.15) K at 10 K intervals. The excess molar enthalpies HE at 303.15 K were also measured. The molar excess Gibbs energies GE were obtained with Barker’s method and fitted to the Redlich–Kister equation. The Wilson equation was also used. Deviations between experimental and predicted GE and HE, by using DISQUAC model, were evaluated. The proximity effect of N atoms produces a decrease of the interactional parameters.

► Vapor pressures for 2-diethylaminoethylamine + cyclohexane mixtures were measured.
► The excess molar enthalpies HE at 303.15 K were measured by C80 calorimeter.
► The data obtained are examined on the basis of Disquac model.
► The influence of the proximity effect of N atoms on HE and GE was investigated.
► The calculated values of GE and HE agree well with the experimental values.