The goal of the paper is the determination of the dynamic viscosity (?) for water-n-propanol solutions, for various concentrations and temperatures. On the basis of the experimental data, the applicability of the Guzman-Andrade and Walther-Ubbelhode equations, regarding the dependence of the dynamic viscosity on the temperature has been tested. Also, starting from the primary experimental data, the activation parameters of viscous flow: variation enthalpy (?Hm#), variation entropy (?Sm#) and free Gibbs’ energy (?Gm#) using the Eyring equation have been calculated. The characterization of the viscous flow involves also the determination of the dependence of dynamic viscosity versus the concentrations of the solutions. For the studied solutions, the excess viscosities have been calculated and it was established the type of deviation from the ideal behavior. This study and the involved parameters are used in projection but also for the complex description of the phenomenon.
