O2
O2 provides ideal gas thermodynamic properties for oxygen gas valid over the temperature range from 200 K to 6000 K based on property information from McBride et al. (2002). The reference state for specific enthalpy is based on the enthalpy of formation relative to the elements at 25 C. The reference state for specific entropy is based on the Third Law of Thermodynamics. The reference values are from:
Bonnie J. McBride, Michael J. Zehe, and Sanford Gordon
"NASA Glenn Coefficients for Calculating Thermodynamic Properties of Individual Species"
NASA/TP-2002-211556, Sept. 2002
https://www.grc.nasa.gov/WWW/CEAWeb/
Transport property correlations are implemented for temperatures between 200 K and 3000 K using correlations provided by N.B. Vargaftik, Y.K. Vinogradov and V.S. Yargin, Handbook of Physical Properties of Liquids and Gases, 3rd ed, 1996, ISBN 1-56700-063-0. (There is a typographical error in equation (1) on page 909. The 3rd coefficient should be a negative value, i.e., -408.723
Note that O2 provides thermodynamic properties assuming ideal gas behavior. Use OXYGEN to provide real fluid properties in the subcooled, saturated mixture, and superheated regimes.