Vapour pressures at eight temperatures of mixtures of di-n-propylether + ethanol, or + 1-butanol thermodynamic description of mixtures of di-n-propylether + alkanol according to the ERAS model

Vapour pressures of di-n-propylether with ethanol and with 1-butanol were measured at eight temperatures between 278.15 and 323.15 K by a static method. Reduction of the vapour pressures to obtain activity coefficients and excess molar Gibbs free energies was carried out by Barker's method. Mixtures containing ethanol show azeotropy with a minimum boiling temperature. G E , H E , and V E , at 298.15 K, of mixtures of di-n-propylether + methanol, + ethanol, +1-propanol, +2-propanol, and + 1-butanol are compared with predictions of the ERAS model observing that the model reproduces acceptably the experimental behaviour.

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