Densities and viscosities , for the binary mixture triethylamine.water have been measured over the entire range of mole fractions at different temperatures, both near and far away fromthe critical temperature Tc (0.076K.(T.Tc).8.276 K). By calculating the corresponding activation parameters H* and S*, it has been shown that a possible connection may be presented between the evolution of these parameters and the critical region. Furthermore, in the one-phase region just below Tc of the critical (TEA.W) binary fluid, the viscosity measurements yield an enhancement as expected for Ising criticality with a crossover to regular behaviour. The regular background is obtained by interpolation from the measurements at non-critical concentrations. Shear viscosity data are consistent with a power lawdivergence = 0(Q 0)zt.yF predicted by the mode-coupling and the dynamic renormalization group theories. Different equations are used in order to determine the critical exponent y, the obtained values are in good agreement with the renormalization group-predicted value. The best fit gives y = z = 0.0391 }0.0002 (i.e., z = 0.0679). Moreover, the resulting value for the wave number Q= 1.0152 }0.0016 nm.1 is in the region found for many other systems.
Compounds
#
Formula
Name
1
C6H15N
triethylamine
2
H2O
water
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.