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https://doi.org/10.1063/1.1681170
Copy DOIJournal: The Journal of Chemical Physics | Publication Date: Feb 1, 1974 |
Citations: 45 |
The viscosities of nitroethane-3-methylpentane mixtures were measured in an Ostwald viscometer over the entire composition range, and over a temperature range of ΔT(= T - Tc) from 11.673 °C to 0.003 °C. The experimental data of this work show quantitatively that the best fit of the viscosity data is to the equation η = (A/φ) (ε−φ − 1) + Bε + C, where A/φ = 0.478 ± 0.04, B = − (1.09 ± 0.05), C = 0.335 ± 0.01, and φ = 0.03 ± 0.01. The value of φ is within experimental error positive and not zero. It clearly indicates that at a temperature very close to the critical temperature the anomalous viscosity shows a very weak power law divergence and is not a cusp nor a logarithmic divergence. The excess shear viscosity is approximately related to the composition by a Gaussian distribution in composition centered about the critical composition, X2c: Δη = f(T) exp {− (1/2)[10(X2 − X2c)]2}.
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