الخلاصة:
The properties associated with liquid mixtures; like density and viscosity,etc…..find
several extensive applications , in chemical engineering ,design .
These properties are important from practical and theoretical point of view to understand liquid
theory and provide informations about molecular interactions.
In this paper, we study the densities and viscosities for binary mixtures of isobutanol with
methylacetae , ethylacetate, and n-propylacetate over the whole range of mixture composition
at 298.15 , 303.15 and 308.15 K .Excess molar volumes vE were calculated from precise density
measurements at different temperatures. The viscosity deviation ηE where calculated from
experimental viscosity values at different temperatures . The observed values of VE
,and η
E
are
discussed in term of molecular interactions in these binary mixture.The experimental results
were fitted to the Redlich-Kister polynomial equation to evaluate the adjustable parameters and
standard deviation for the ideal case.