Notion of viscosity Arrhenius temperature for N,N-dimethylacetamide with N,N-dimethylformamide binary mixtures and its pure components

Abstract

Excess properties calculated from the experimental values of densities and viscosities have been presented in the previous work. These experimental values can also lead us to test different correlation equations as well as their corresponding relative functions. Inspection of the Arrhenius activation energy Ea and the enthalpy of activation of viscous flow ΔH* found very close values, here we can define partial molar activation energy Ea₁ and Ea₂ for N,N-dimethylacetamide and methanol respectively along with their individual contribution separately. Correlation between the two Arrhenius parameters of viscosity in all compositions shows existence of distinct behaviours separated by particular mole fractions of N,N-dimethylacetamide. In addition, the correlation between Arrhenius parameters reveals interesting Arrhenius temperature which is closely related to the vaporisation temperature in the liquid vapour equilibrium and the limiting corresponding partial molar properties that can permit us to estimate the boiling points of the pure components.

Keywords:

• binary liquid mixture
• viscosity
• Arrhenius activation energy
• Arrhenius temperature
• boiling temperature