THERMODYNAMIC CHARACTERISTICS OF A VISCOUS FLOW IN AQUEOUS 
SOLUTIONS OF BARIUM NITRATE

N. D. Azizov and A. B. Zeinalova

UDC 541.13

An experimental investigation of the dynamic viscosity 
of aqueous solutions of Ba(NO3)2 at temperatures of 298-598 K 
and pressures of 5-40 MPa is carried out on a setup based 
on the extension-capillary method. The uncertainty of the 
data does not exceed 1.5%. An equation that describes the 
experimental data is constructed. The free energy and 
enthalpy of viscous flow activation have been calculated.

Azerbaijan State Petroleum Academy, 20 Azadlyg Ave., Baku, 
Az1010, Azerbaijan. Translated from Inzhenerno-Fizicheskii Zhurnal, 
Vol. 78, No. 2, pp. 152-159, March-April, 2005. Original article 
submitted July 28, 2003; revision submitted June 10, 2004.