VISCOSITIES OF BINARY-LIQUID MIXTURES OF BUTANOL PLUS PENTANE, PLUS HEXANE, PLUS HEPTANE, AND PLUS OCTANE AT T = 298.15 K

Kinematic viscosities nu have been measured for binary liquid mixtures of butanol (n-C4H9OH) + pentane (n-C5H12), + hexane (n-C6H14), + hept ane (n-C7H16), and + octane (n-C8H18) at T = 298.15 K. Values of nu ha ve been used to calculate dynamic viscosities eta, using available den sity data. The values of the quantity Delta eta, which refers to the d eviations of eta of mixtures from those arising from a mole fraction a verage, have also been calculated. The values of nu, eta, and Delta et a have been fitted in appropriate equations using a least-squares meth od. The analysis has shown that McAllister's approach correlates the l iquid-mixture viscosity data of the present systems throughout the ent ire composition range to a significantly high degree of accuracy, wher eas Lobe's approach predicts nu of mixtures to a lower degree of accur acy.