Isobaric Properties for Oxygen

• Fluid Data
• Auxiliary Data
• References and Notes
• Notes
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Fluid Data

Isobaric Data for P = 0.020000 MPa

Auxiliary Data

Reference States

Additional fluid properties

References and Notes

Equation of state

Schmidt, R. and Wagner, W., "A New Form of the Equation of State for Pure Substances and its Application to Oxygen," Fluid Phase Equilib., 19:175-200, 1985.

also published in:

Stewart, R.B., Jacobsen, R.T, and Wagner, W., "Thermodynamic Properties of Oxygen from the Triple Point to 300 K with Pressures to 80 MPa," J. Phys. Chem. Ref. Data, 20(5):917-1021, 1991.

The uncertainties of the equation of state are 0.15% in vapor pressure, 0.1% in density, 2% in heat capacity, and 1% in the speed of sound, except in the critical region.

Auxillary model, Cp0

Refit by Roland Span of the Schmidt and Wagner equation listed below to account for the electronic contribution up to 2000 K with Planck-Einstein terms only.

Schmidt, R. and Wagner, W., "A New Form of the Equation of State for Pure Substances and its Application to Oxygen," Fluid Phase Equilib., 19:175-200, 1985.

Auxillary model, PX0

Refit by Roland Span of the Schmidt and Wagner equation listed below to account for the electronic contribution up to 2000 K with Planck-Einstein terms only.

Schmidt, R. and Wagner, W., "A New Form of the Equation of State for Pure Substances and its Application to Oxygen," Fluid Phase Equilib., 19:175-200, 1985.

Auxillary model, PH0

Refit by Roland Span of the Schmidt and Wagner equation listed above.

Viscosity

Lemmon, E.W. and Jacobsen, R.T, "Viscosity and Thermal Conductivity Equations for Nitrogen, Oxygen, Argon, and Air," Int. J. Thermophys., 25:21-69, 2004.

The uncertainty is 1% in the dilute gas at temperatures above 200 K, and 5% in the dilute gas at lower temperatures. The uncertainty is around 2% between 270 and 300 K, and increases to 5% outside of this region. The uncertainty may be higher in the liquid near the triple point.

Auxillary model, the collision integral

Lemmon, E.W. and Jacobsen, R.T, 2004.

Thermal conductivity

Lemmon, E.W. and Jacobsen, R.T, "Viscosity and Thermal Conductivity Equations for Nitrogen, Oxygen, Argon, and Air," Int. J. Thermophys., 25:21-69, 2004.

The uncertainty for the dilute gas is 2% with increasing uncertainties near the triple point. The uncertainties range from 3% between 270 and 300 K to 5% elsewhere. The uncertainties above 100 MPa are not known due to a lack of experimental data.

Auxillary model, the thermal conductivity critical enhancement

Lemmon, E.W. and Jacobsen, R.T, 2004.

Surface tension

Dielectric constant

Metling line

Schmidt, R. and Wagner, W., "A New Form of the Equation of State for Pure Substances and its Application to Oxygen," Fluid Phase Equilib., 19:175-200, 1985.

Sublimation line

Lemmon, E.W., 2003.

Vapor pressure

Cullimore, I.D., 2010.

Functional Form: P=Pc*EXP[SUM(Ni*Theta^ti)*Tc/T] where Theta=1-T/Tc, Tc and Pc are the reducing parameters below, which are followed by rows containing Ni and ti.

Saturated liquid density

Cullimore, I.D., 2010.

Functional Form: D=Dc*[1+SUM(Ni*Theta^ti)] where Theta=1-T/Tc, Tc and Dc are the reducing parameters below, which are followed by rows containing Ni and ti.

Saturated liquid volume

Cullimore, I.D., 2010.

Functional Form: D=Dc*EXP[SUM(Ni*Theta^ti)] where Theta=1-T/Tc, Tc and Dc are the reducing parameters below, which are followed by rows containing Ni and ti.

Notes

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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