Isothermal Properties for Nitrogen
- Fluid Data
- Auxiliary Data
- Additional Information
- Important Information About This Data
- Other Data Available:
Isothermal Data for T = 12.000 C
|Temperature (C)||Pressure (bar)||Density (kg/m3)||Volume (m3/kg)||Internal Energy (kJ/kg)||Enthalpy (kJ/kg)||Entropy (J/g*K)||Cv (J/g*K)||Cp (J/g*K)||Sound Spd. (m/s)||Joule-Thomson (K/bar)||Viscosity (Pa*s)||Therm. Cond. (W/m*K)||Phase|
Reference States, default for fluid
|Enthalpy||H = 309.269908 kJ/kg at 25.00 C and 1.000 bar.|
|Entropy||S = 6.839209 J/g*K at 25.00 C and 1.000 bar.|
Additional fluid properties
|Critical temperature (Tc)||-146.958 C|
|Critical pressure (Pc)||33.958 bar|
|Critical density (Dc)||313.300 kg/m3|
|Normal boiling point||-195.795 C|
|Dipole moment||0.0 Debye|
Equation of state, auxiliary model, and melting curve
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. [all data]
Jacobsen, R.T.; Stewart, R.B.; Jahangiri, M., Thermodynamic properties of nitrogen from the freezing line to 2000 K at pressures to 1000 MPa., J. Phys. Chem. Ref. Data, 1986, 15(2), 735-909. [all data]
Auxiliary model and dielectric constant
Younglove, B.A., Thermophysical Properties of Fluids. I. Argon, Ethylene, Parahydrogen, Nitrogen, Nitrogen Trifluoride, and Oxygen, J. Phys. Chem. Ref. Data, 1982, 11, 1-11. [all data]
Lemmon, E.W.; Penoncello, S.G., The Surface Tension of Air and Air Component Mixtures, Adv. Cryo. Eng., 1994, 39, 1927-1934. [all data]
Equation of state
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.
The uncertainty in thermal conductivity is 2%.
The uncertainty in viscosity is 2%, except in the dilute gas, where the uncertainty is 0.5%.
Important Information About This Data
The data above are from an older version of the NIST Reference Fluid Thermodynamic and Transport Properties Database (REFPROP version 7). We will be updating our site to use the newer version (version 10) of this database in the future. Information on REFPROP version 10 can be found on theREFPROP web page. REFPROP version 10 includes additional data and features not available from this site.
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.