CHED 1404

The non-idealities of binary mixtures of hexan-1-ol and cyclohexan-1-ol with n-octane and n-nonane were studied as functions of composition over the temperature range 15 to 45° Celsius to seek trends due to intermolecular interactions as quantified by the signs and magnitudes of viscosity deviations, excess V, excess n, and excess G. The excess quantities were determined from viscometry, dilatometry, refractometry, and laser light scattering measurements. At all temperatures and compositions the excess G values were positive becoming more positive with increasing temperature. The excess V values showed interesting changes with linear vs cyclic alcohol structure and alkane chain length. The figure on the left is for cyclohexan-1-ol with alkanes and the figure on the right is for hexan-1-ol. The legend Xs 15°, boxes 25°, circles 35°, and diamonds 45° Celsius.