Isothermal Properties for Nitrogen

Fluid Data

Isothermal Data for T = 100.00 F

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Auxiliary Data

Reference States

Additional fluid properties

References and Notes

Equation of state

Span, R.; Lemmon, E.W.; Jacobsen, R.T.; Wagner, W.; Yokozeki, A., A Reference Equation of State for the Thermodynamic Properties of Nitrogen for Temperatures from 63.151 to 1000 K and Pressures to 2200 MPa, J. Phys. Chem. Ref. Data, 2000, 29, 6, 1361-1433, https://doi.org/10.1063/1.1349047 . [all data]

Span, R., Lemmon, E.W., Jacobsen, R.T, Wagner, W., and Yokozeki, A., "A Reference Equation of State for the Thermodynamic Properties of Nitrogen for Temperatures from 63.151 to 1000 K and Pressures to 2200 MPa," J. Phys. Chem. Ref. Data, 29(6):1361-1433, 2000.

see also: Int. J. Thermophys., 19(4):1121-1132, 1998.

The uncertainty in density of the equation of state is 0.02% from the triple point up to temperatures of 523 K and pressures up to 12 MPa and from temperatures of 240 to 523 K at pressures less than 30 MPa. In the range from 270 to 350 K at pressures less than 12 MPa, the uncertainty in density is 0.01%. The uncertainty at very high pressures (>1 GPa) is 0.6% in density. The uncertainty in pressure in the critical region is estimated to be 0.02%. In the gaseous and supercritical region, the speed of sound can be calculated with a typical uncertainty of 0.005% to 0.1%. At liquid states and at high pressures, the uncertainty increases to 0.5% - 1.5%. For pressures up to 30 MPa, the estimated uncertainty for heat capacities ranges from 0.3% at gaseous and gas like supercritical states up to 0.8% at liquid states and at certain gaseous and supercritical states at low temperatures. The uncertainty is 2% for pressures up to 200 MPa and larger at higher pressures. The estimated uncertainties of vapor pressure, saturated liquid density, and saturated vapor density are in general 0.02% for each property. The formulation yields a reasonable extrapolation behavior up to the limits of chemical stability of nitrogen.

Auxillary model, Cp0

Span, R., Lemmon, E.W., Jacobsen, R.T, Wagner, W., and Yokozeki, A., 2000.

Auxillary model, PX0

Span, R., Lemmon, E.W., Jacobsen, R.T, Wagner, W., and Yokozeki, A., 2000.

Auxillary model, PH0

Span, R., Lemmon, E.W., Jacobsen, R.T, Wagner, W., and Yokozeki, A., 2000.

Viscosity

Lemmon, E.W.; Jacobsen, R.T., Viscosity and Thermal Conductivity Equations for Nitrogen, Oxygen, Argon, and Air, Int. J. Thermophys., 2004, 25, 1, 21-69, https://doi.org/10.1023/B:IJOT.0000022327.04529.f3 . [all data]

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 0.5% in the dilute gas. Away from the dilute gas (pressures greater than 1 MPa and in the liquid), the uncertainties are as low as 1% between 270 and 300 K at pressures less than 100 MPa, and increase outside that range. The uncertainties are around 2% at temperatures of 180 K and higher. Below this and away from the critical region, the uncertainties steadily increase to around 5% at the triple points of the fluids. The uncertainties in the critical region are higher.

Auxillary model, the collision integral

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

Thermal conductivity

Lemmon, E.W.; Jacobsen, R.T., Viscosity and Thermal Conductivity Equations for Nitrogen, Oxygen, Argon, and Air, Int. J. Thermophys., 2004, 25, 1, 21-69, https://doi.org/10.1023/B:IJOT.0000022327.04529.f3 . [all data]

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. For the non-dilute gas, the uncertainty is 2% for temperatures greater than 150 K. The uncertainty is 3% at temperatures less than the critical point and 5% in the critical region, except for states very near the critical point.

Auxillary model, the thermal conductivity critical enhancement

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

Surface tension

Mulero, A.; Cachadiña, I.; Parra, M.I., Recommended Correlations for the Surface Tension of Common Fluids, J. Phys. Chem. Ref. Data, 2012, 41, 4, 043105, https://doi.org/10.1063/1.4768782 . [all data]

Dielectric constant

Harvey, A.H.; Lemmon, E.W., Method for Estimating the Dielectric Constant of Natural Gas Mixtures, Int. J. Thermophys., 2005, 26, 1, 31-46, https://doi.org/10.1007/s10765-005-2351-5 . [all data]

Metling line

Span, R.; Lemmon, E.W.; Jacobsen, R.T.; Wagner, W.; Yokozeki, A., A Reference Equation of State for the Thermodynamic Properties of Nitrogen for Temperatures from 63.151 to 1000 K and Pressures to 2200 MPa, J. Phys. Chem. Ref. Data, 2000, 29, 6, 1361-1433, https://doi.org/10.1063/1.1349047 . [all data]

Span, R., Lemmon, E.W., Jacobsen, R.T, Wagner, W., and Yokozeki, A., "A Reference Equation of State for the Thermodynamic Properties of Nitrogen for Temperatures from 63.151 to 1000 K and Pressures to 2200 MPa," J. Phys. Chem. Ref. Data, 29(6):1361-1433, 2000.

see also: Int. J. Thermophys., 19(4):1121-1132, 1998.

Sublimation line

Lemmon, E.W., 1999.

Vapor pressure

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

Functional Form: D=Dc*EXP[SUM(Ni*Theta^(ti/3))] 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

Functional Form: D=Dc*EXP[SUM(Ni*Theta^(ti/3))*Tc/T] where Theta=1-T/Tc, Tc and Dc are the reducing parameters below, which are followed by rows containing Ni and ti.

The fluid data above is also available from the NIST Reference Fluid Thermodynamic and Transport Properties Database. This product includes additional features not available from this web site.

Notes