Vapour–liquid equilibria and excess enthalpies of the binary mixtures 1-pentanol with 2,2,4-trimethylpentane or n-heptane

Accurate experimental data of vapour–liquid equilibria (VLE) and excess enthalpies are reported for the binary systems (1-pentanol + 2,2,4-trimethylpentane) and (1-pentanol + n-heptane). An isothermal total pressure cell was used for measuring the VLE at T = 313.15 K. The data were correlated using Margules, Wilson, NRTL and UNIQUAC equations. The enthalpies of mixing were measured at two different temperatures T = (298.15 and 313.15) K using an isothermal flow calorimeter and were correlated by the Redlich–Kister equation. The thermodynamic behaviour is discussed.

► VLE and HE measurements are reported for the binary mixtures 1-pentanol and isooctane or heptane.
► The experimental data were correlated using Redlich–Kister, Margules, Wilson, NRTL and UNIQUAC.
► A positive deviation from the ideal behaviour is observed for both systems.