# Oxygen¶

## References¶

### Equation of State¶

R. Schmidt and W. Wagner. A New Form of the Equation of State for Pure Substances and its Application to Oxygen. Fluid Phase Equilib., 19(3):175–200, 1985. doi:10.1016/0378-3812(85)87016-3.

Richard B. Stewart, Richard T. Jacobsen, and W. Wagner. 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. doi:10.1063/1.555897.

### Thermal Conductivity¶

E. W. Lemmon and R. T Jacobsen. Viscosity and Thermal Conductivity Equations for Nitrogen, Oxygen, Argon, and Air. Int. J. Thermophys., 25(1):21–69, 2004. doi:10.1023/B:IJOT.0000022327.04529.f3.

### Viscosity¶

E. W. Lemmon and R. T Jacobsen. Viscosity and Thermal Conductivity Equations for Nitrogen, Oxygen, Argon, and Air. Int. J. Thermophys., 25(1):21–69, 2004. doi:10.1023/B:IJOT.0000022327.04529.f3.

### Melting Line¶

Ben A Younglove. Thermophysical properties of fluids. I. Argon, ethylene, parahydrogen, nitrogen, nitrogen trifluoride, and oxygen. Technical Report, DTIC Document, 1982.

### Surface Tension¶

A. Mulero, I. Cachadiña, and M. I. Parra. Recommended Correlations for the Surface Tension of Common Fluids. J. Phys. Chem. Ref. Data, 41(4):043105–1:13, 2012. doi:10.1063/1.4768782.

## Aliases¶

oxygen, OXYGEN, O2, R732

## Fluid Information¶

Parameter, Value
General
Molar mass [kg/mol] 0.0319988
CAS number 7782-44-7
ASHRAE class UNKNOWN
Formula $$O_{2}$$
Acentric factor 0.0222
InChI InChI=1/O2/c1-2
InChIKey MYMOFIZGZYHOMD-UHFFFAOYAM
SMILES O=O
ChemSpider ID 952
2D image
Limits
Maximum temperature [K] 2000.0
Maximum pressure [Pa] 80000000.0
Triple point
Triple point temperature [K] 54.361
Triple point pressure [Pa] 146.277647058
Critical point
Critical point temperature [K] 154.581
Critical point density [kg/m3] 436.143644
Critical point density [mol/m3] 13630.0
Critical point pressure [Pa] 5043000.0

## REFPROP Validation Data¶

Note

This figure compares the results generated from CoolProp and those generated from REFPROP. They are all results obtained in the form $$Y(T,\rho)$$, where $$Y$$ is the parameter of interest and which for all EOS is a direct evaluation of the EOS

You can download the script that generated the following figure here: (link to script), right-click the link and then save as... or the equivalent in your browser. You can also download this figure as a PDF.

## Consistency Plots¶

The following figure shows all the flash routines that are available for this fluid. A red + is a failure of the flash routine, a black dot is a success. Hopefully you will only see black dots. The red curve is the maximum temperature curve, and the blue curve is the melting line if one is available for the fluid.

In this figure, we start off with a state point given by T,P and then we calculate each of the other possible output pairs in turn, and then try to re-calculate T,P from the new input pair. If we don’t arrive back at the original T,P values, there is a problem in the flash routine in CoolProp. For more information on how these figures were generated, see CoolProp.Plots.ConsistencyPlots

Note

You can download the script that generated the following figure here: (link to script), right-click the link and then save as... or the equivalent in your browser. You can also download this figure as a PDF.