Self-diffusion coefficients (254 to 348) K obtained by spin-echo NMR and viscosities (263 to 343) K obtained with a falling-body viscometer are reported at pressures to 350 MPa for 2,2,2trifluoroethanol (TFE). Along the coexistence curve, the transport coefficients vary as exp(A+ B/T2) (Avramov eq with n = 2): at high pressures, the temperature dependence is more complex, varying as exp(A+ B/T + C/T2), so the temperature dependence changes with increasing pressure. Unlike non-H-bonded liquids, Stokes-Einstein-Sutherland (SES) self-diffusion - viscosity plots do not fall on a single line: the isotherms are approximately parallel and of smaller slope (t ~ 0.84 - 0.90) than the atmospheric pressure line (t ~ 1). In this, TFE is like methanol, ethanol and propanol. Such SES behaviour is suggested as a diagnostic for association in H-bonded liquids. TFE does not meet the requirements for thermodynamic scaling.
Compounds
#
Formula
Name
1
C2H3F3O
2,2,2-trifluoroethanol
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.