Viscosity Arrhenius Activation Energy and Derived Partial Molar Properties in Isobutyric Acid + Water Binary Mixtures Near and Far Away from the Critical Temperature, 302.15 to 313.15 K

A novel approach to discuss the viscosity Arrhenius behaviour and to derive the partial molar properties in binary mixtures of N,N-dimethylacetamide with 2-methoxyethanol in the temperature interval (from 298.15 to 318.15) K

“…With this finding, we can predict the boiling point of the two pure components at constant pressure through investigation of the viscosity-temperature dependence in the corresponding liquid phase. We can add that this very interesting finding is also verified for other studied previous works [1][2][3][4][5][6][7][8][9][10] in different binary mixtures (Table 3). Taking into account the accuracy of data and the errors made in the calculations, we can conclude that the Arrhenius' current temperature at very high concentration of one component (T Ai ) at (x i ≈ 1) is very close to its corresponding boiling temperature while in the other cases, the Arrhenius' current temperatures (T Ai ) at (x i ≠ 1) is in strong correlation with the vaporisation temperature of the isobaric liquid vapour equilibrium of the corresponding binary mixture.…”

“…The As-values are closely related to the viscosity of the system in vapour-phase, [9] which is greater in DMA-rich region than that of MOE and can assume that the DMA molecules bounding are more correlated and ordered in vapour state. Furthermore, the correlation curve of these two properties show linear behaviour for some other previously studied binary mixtures such as water with isobutyric acid (IBA), [10,11] 1,4-dioxane [9] and N,Ndimethylacetamide with 2-ethoxyethanol (EOE), [1] water, [12] formamide (FA), [13] N, N-dimethylformamide (DMF) [14] and methanol (Met), [15] and DMF with (Met). [16] The pre-exponential entropic factor (As) equivalent to the viscosity at infinite temperature (As = η ∞ ) is very closely related to the viscosity of the same system in vapour-phase at the normal boiling temperature and at the same pressure.…”

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

“…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.…”

“…In addition, we can consider roughly the linear behaviour which is also noticed for some other studied binary liquid mixtures like water with 1,4-dioxane or isobutyric acid or DMA, etc. [2,6,[20][21][22]25,[44][45][46][47][48][49][50].…”

“…Furthermore, the close dependence on composition, between the molar enthalpy of viscous flow (∆H*) and the viscosity activation energy (Ea) guided to considering that (Ea) is approximately a thermodynamic state function for which partial quantities have been determined to arise individual interaction's contributions of each pure solvent within the fluid mixture for each mole composition and the new given parameter nominated as the current Arrhenius temperature (TAi) related to each pure solvent (i) can provide in a reliable estimation of the boiling point value of the two pure solvents constituting the studied binary fluid mixture [20,21,[44][45][46][47][48][49][50].…”