Viscosity Arrhenius Activation Energy and Derived Partial Molar Properties in 1,4-Dioxane + Water Binary Mixtures from 293.15 to 323.15 K

Abstract

The knowledge and prediction of physicochemical properties of binary liquid mixtures is of great importance for understanding intermolecular interactions. Viscosities (η) have been investigated by using density (ρ) and kinematic viscosity (ν) measurements for 1,4-dioxane + water (D-W) mixtures over the entire range of mole fractions under atmospheric pressure, at 311.15, 316.15 and 320.15 K, in order to increase the studied temperatures range available from the literature and to improve the investigations. The viscosity Arrhenius activation energy of 1,4-dioxane + water mixtures was calculated from the present experimental viscosity measurements, and those presented in a previous work at only four temperatures, and for three temperatures in the present work, over the entire range of composition in the temperatures range from 293.15 to 323.15 K. Based on the partial molar activation energy from the Arrhenius equation for viscosity, interactions between water and 1,4-dioxane molecules are discussed. Comparison between some reduced Redlich-Kister functions covering the composition domain shows the existence of two distinct behaviors.

A Novel Approach of Partial Derivatives to Estimate the Normal Boiling Temperature via Viscosity Arrhenius Behaviour in N,N-Dimethylformamide + Ethanol Fluid Systems

“…The A s -values are very close to the shear viscosity of the same system in its vapour-phase at the same pressure and at the normal boiling temperature [20][21][22][23][24][25][26][27]. Thus the high A s -value of DMF, imply that the shear viscosity of DMF at vapour phase is nearly about ten times than of EtOH and it is also concluded that EtOH molecules bounding are more random and disordered in vapour state.…”

“…In the same context, the variation of the activation energy E a versus the molar composition (x 1 ) can give evidence of eventual change or modification in the complex structure or clusters [20] [ formed in binary fluid systems under effect of temperature and/or mixture composition [20][21][22][23][24][25][26][27]. When the activation energy Ea for the full mole compositions in the studied fluid system is depicted in Fig.…”

“…Case of pure components: For phenomenological discussion of the causal correlation, we have proposed an extra endogenous variable such as the viscosity Arrhenius temperature (T A ) where the reciprocal value is determined by the intercept to abscissa axis (1/T A ) or using the following equation: Table-2 summarizes the viscosity Arrhenius parameters of some solvents studied in previous works [21][22][23][24][25][26]35,39,41,[44][45][46][47][48][49][50] and Fig. 3 indicates mutual correlation between the parameters (Ea, ln As and TA) of Arrhenius.…”

“…where the subscripts (1) and (2) denote (DMF) and (EtOH), respectively and η 21 is equal to the famous reduced (R-K) function Q exp,h,T (x 1 = 1) as defined in previous works [22][23][24][25][26][27], which is expression by the ratio of (eqn. 13) representing the experimental reduced R-K excess quantities Q Y,exp,T (x 1 ),…”

“…from which we can obtain the following limit: Starting from the fact that the reduced RK excess quantities Q Y,exp,T (x 1 ) [20][21][22][23][24][25][26][27] in binary fluid mixtures, gives evidence of some information on the deviation to linearity (or ideality) and from the relationship [28][29][30][31][32][33] between the surface tension (γ), the absolute viscosity (η) and the friccohesity (σ), we can remark that the discussion only on the RK reduced quantities related to the absolute viscosity Q exp,h,T (x 1 =1) [20][21][22][23][24][25][26][27] is insufficient because it implicitly consider different natures of interaction's forces (cohesive and frictional forces, etc.). Then, we must explicit these different manifestations of forces from the surface tension (γ) and the friccohesity (σ) [28][29][30][31][32][33].…”