Excess Molar Volumes for (Binary Mixtures of 1-Alkanol and 1-Alkene). I. The System 1-Alkanol + 1-Octene at 25°C

Excess volumes measured at 25°C are reported for binary mixtures of the C3, C4, C6, C8, and C10 1-alkanols with 1-octene. In this series of mixtures, the excess-volume curves change from positive values over the whole concentration range for short-chain alkanols C3 and C4, to sigmoid for longer-chain alkanols (with positive values in the alkanol-rich region). The positive region decreases with increasing chain length of the 1-alkanol. Excess partial molar volumes of the components are calculated. The results are compared with those for mixtures of 1-alkanols with n-octane. The model of associated mixtures proposed by Treszczanowicz and Benson3 describes very well the size and shape of the excess volume for the class of systems considered.