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Abstract |
The Influence of Microstructure of
Media on Nonlinear Acoustic Parameter of Solutions
E.S.Balankina, O.N.Erofeeva (Laboratory
of Structure of Aqueous Solutions, N.S.Kurnakov Institute of General and
Inorganic Chemistry RAS, Moscow, Russia)
e-mail:
Balankina@mail.ru
The
acoustic nonlinear parameter B/A is strongly structure sensitive as it was
shown in [Lesnyanskii et al. Sov Phys Acous.(1974), 20, p.39]. The analysis of
structural properties of electrolyte and nonelectrolyte solutions can be
carried out with united positions using such microscopic parameter as a packing
coefficient (Y). The concentration dependence of Y and the interrelation
between Y and B/A was deduced for ideal and close to ideal solutions (regular,
isochoric and athermal). In the framework of thermodynamic approach the
interrelation between the relative deviation of packing coefficient from
additive concentration rule (Ye/Yid) and B/A was deduced. The values of
parameters (Ye/Yid and derivative Ye with respect to pressure) are calculated
from offered method [Balankina E.S. Proceeding of XI Session of the Russian
Acoustic Society, Moscow, 2001 (http://www.akin.ru/RAO/sess11)] using
volumetric-elastic properties of solutions. Using these parameters, the
nonlinear acoustic parameter was calculated for solutions with different types
of intermolecular interactions. The calculated values and experimental values
of B/A are in a good agreement within experimental error. From analysis it
follows the important role of geometrical packing effects on B/A for aqueous
and nonaqueous nonelectrolyte solutions, weak electrolyte solutions and molten
salt mixtures. The work was supported by 6 competition-expert of young
scientist RAS (grant N 175)
Section
: 4