Surface Tension of Binary Mixtures of 2,2,4-Trimethylpentane +1-Alkanols from 298.15 to 323.15 K

Abstract

Surface tension of binary systems of 2,2,4- trimethylpentane with 1-alkanols (ethanol, 1-propanol, 1-pentanol, 1-hexanol, or 1-heptanol) were measured at several different temperature and atmospheric pressure over the whole range of composition using the surface laser light scattering method, and the combined expanded uncertainties are less than 1%. The excess surface tensions, σ E, for these binary mixtures are calculated and fitted to the Redlich–Kister type equation, and the regression parameters and the standard deviations of the fitting are given. All of the σ E values are negative over the whole composition range for these systems and decrease with the temperature increasing. Surface tensions were also used to estimate surface entropy, S σ, and surface enthalpy, H σ . These results may be useful for the development of the hydrocarbon fuels.