SULFURHEXAFLUORIDE
SulfurHexafluoride (SF6) provides high accuracy thermodynamic properties for sulfur hexafluoride (Molar mass =146.054 g/mole) using the Fundamental Equation of State, as described by:
Span, R. and Wagner, W.
"Equations of State for Technical Applications: II Results for Non-Polar Fluids"
Int. J. of Thermophysics, Vol. 24, No. 1, Jan. 2003
The specific heat of sulfur hexafluoride in the ideal gas state uses the equation given by:
Cole, W.A. and de Reuck, K.M.
An Interim Analytic Equation of State for Sulfurhexafluoride
International Journal of Thermophysics, Vol. 11, 1990, pp. 189-199
Reference State
h = 0 kJ/kg, s = 0 kJ/kg-K at 273.15 K, 101.325 kPa. The reference state can be changed using the $Reference directive.
Range of applicability for equation of state:
222.38 K < T < 750 K
0 < P < 60 MPa
Thermal conductivity correlations were fit to tabular data provided in:
"Handbook of Physical Properties of Liquids and Gases"
Natan B. Vargaftik, Yurii K. Vinogradov, and Vadim S. Yargin
3rd Augmented and Revised Edition
Begell House, Inc
Gas-phase viscosity is from:
"Recommended Values for the Viscosity in the Limit of Zero Density and its Initial Density Dependence for Twelve Gases and Vapors: Revisited from Experiment
between 297 K and 691 K"
Eckhard Vogel
J. Phys. Chem. Ref. Data 49, 043102 (2020); https://doi.org/10.1063/5.0023688
Range of applicability for transport function correlations:
Gas-phase viscosity: 222 K to 750K
Liquid-phase viscosity: 222 K to 318.7 K
Gas-phase thermal conductivity: 220 K to 750 K
Liquid-phase thermal conductivity: 222 K to 318.7 K
Surface tension data are provided using the information in:
Mulero, A., Cachadina, I, and Parra, M.
"Recommended Correlations for the Surface Tension of Common Fluids"
J.Phys. Chem Ref. Data, Vol. 41, No.4, 2012
The melting pressure curve (valid for temperatures between the triple point temperature and 253 K) is determined from:
Harvey, A.,
"On the Melting Curve of Sulfur Hexafluoride,"
Journal of Physical and Chemical Reference Data 46, 043102 (2017).