Abstract

Calculating the Part of the Nonlinearity Parameter for Two Component System

D.Denisov (The Mendeleev Chemical Technology University, Moscow, Russia)

e-mail: abramova@iname.com

The known relation for nonlinearity parameter B/A allows to calculate the pointed quantity if the value of the derivatives of sound velocity u on temperature T and pressure P are known. The dependence of u on T and P for two component mixture can be found from the relation for sound velocity in the mentioned mixture Umix which was derived by the author earlier. This relation is applyable to the mixture which formation from the pure components follows the next conditions: 1)The mixture volume is equal the sum of the volumes of the components. 2)The variation of the system enthalpy at mixing of the pure components does not depend on T. The calculated value of the derivative of Umix on T at constant P for the mixture of tetrachloride carbon (mole fraction =0.3) and methyl alcohol is equal to -2.759 m/cK. The value of the considered derivative found from the experimental dependence Umix/T is equal to -2.96 m/cK.

Section : 4