MIXING PROPERTIES OF THE LIQUID-SYSTEM 2-PROPANOL+CYCLOHEXANE

We investigate the Liquid system 2-propanol + cyclohexane at 25 degrees C over the entire range of compositions. We obtain the excess Gibbs function (from vapour-liquid equilibrium data), the excess enthalpy (from calorimetric measurements), the excess entropy (from a combination of both), the excess volume (from pycnometric density data), and the viscosity (from experiments in an Ubbelohde viscometer). The molar excess Gibbs function, the molar excess enthalpy, and the molar excess volume are positive throughout, the first quantity being the most symmetric one with regard to the composition dependence (''symmetry rule''). The molar excess entropy is very asymmetric; it is positive in a small region of low alcohol content and negative in the main composition range. The viscosity shows a flat minimum, but is otherwise inconspicuous in its composition dependence.