Huber, M.
and Laesecke, A.
(2006),
Correlation for the Viscosity of Pentafluoroethane (R125) from the Triple Point to 500 K at Pressures up to 60 MPa., Industrial and Engineering Chemistry Research, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50246
(Accessed August 31, 2025)
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Correlation for the Viscosity of Pentafluoroethane (R125) from the Triple Point to 500 K at Pressures up to 60 MPa.
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Abstract
A correlation for the viscosity of pentafluorethane (R125) has been developed based on a compilation and critical assessment of the available experimental data. The correlation covers a wide range of fluid states, including the supercritical region. It is applicable from the triple point at 172.52 K to 500 K with pressures varying up to 60 MPa. The formulation includes a zero-density contribution, initial density dependence based on the Rainwater-Friend theory, and a residual contribution for higher densities that combines virial terms with a free-volume term, both temperature dependent. The estimated uncertainty of the viscosity correlation (coverage factor of two) is 3 % along the liquid-phase saturation boundary, 3 % in the compressed liquid phase at pressures to 60 MPa, and is 0.8 % in the vapor.Citation
Industrial and Engineering Chemistry Research
Volume
45
Issue
12
Pub Type
Journals
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Keywords
correlation, modeling, pentafluoroethane, R125, refrigerant, solvent, viscosity
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Created May 5, 2006, Updated February 19, 2017