Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Nitrogen - Thermophysical Properties

Chemical, Physical and Thermal Properties of Nitrogen - N2.

Sponsored Links

Nitrogen, N2, is at standard conditions a colorless odorless gas. The gas makes up the major portion of the atmosphere, but will not support life by itself. Refrigerated (cryogenic) nitrogen, is a colorless odorless liquid.

Gaseous nitrogen is used in food processing, in purging air conditioning and refrigeration systems, and in pressurizing aircraft tires. Liquid nitrogen is used to freeze foods, to preserve whole blood and other biologicals, and as a coolant.

Nitrogen is nontoxic and noncombustible, but it may cause asphyxiation by displacement of air. Liquid nitrogen is very cold and and contact may cause frostbite. Under prolonged exposure to fire or heat, nitrogen containers may rupture violently and rocket.

The phase diagram of nitrogen is shown below the table.

Chemical, physical and thermal properties of Nitrogen:
Values at 25oC (77oF, 298 K) and atmospheric pressure

Molecular Weight 28.013
Specific Gravity, air = 1 0.967
Specific Volume (ft3/lb, m3/kg) 13.98, 0.872
Density of liquid at atmospheric pressure (lb/ft3, kg/m3) 50.46, 808.4
Absolute Viscosity (lbm/ft s, centipoises) 12.1 10-6, 0.018
Sound velocity in gas (m/s) 353
Specific Heat - cp - (Btu/lboF or cal/goC, J/kgK) 0.249, 1040
Specific Heat Ratio - cp/cv 1.40
Gas constant - R - (ft lb/lboR, J/kgoC) 55.2, 297
Thermal Conductivity (Btu/hr ft oF, W/moC) 0.015, 0.026
Boiling Point - at saturation pressure 14.7 psia and 760 mm Hg - (oF, oC) -320.4, -195.8
Latent Heat of Evaporation at boiling point (Btu/lb, J/kg) 85.5, 199000
Freezing or Melting Point  at 1 atm (oF, oC) -346, -210
Latent Heat of Fusion (Btu/lb, J/kg) 11.1, 25800
Critical Temperature (oF, oC) -232.6, -147
Critical Pressure (psia, MN/m2) 493, 3.40
Critical Volume (ft3/lb, m3/kg) 0.051, 0.00318
Flammable no

Follow the links below to get values for the listed properties of nitrogen at varying pressure and temperature:

See also more about atmospheric pressure, and STP - Standard Temperature and Pressure & NTP - Normal Temperature and Pressure,
as well as Thermophysical properties of: Acetone, Acetylene, Air, Ammonia, Argon, Benzene, Butane, Carbon dioxide, Carbon monoxide, Ethane, Ethanol, Ethylene, Helium, Hydrogen, Hydrogen sulfide, Methane, Methanol, Oxygen, Pentane, Propane, Toluene, Water and Heavy water, D2O.

Back to top

Nitrogen is a gas at standard conditions. However, at low temperature and/or high pressures the gas becomes a liquid or a solid.

The nitrogen phase diagram shows the phase behavior with changes in temperature and pressure. The curve between the critical point and the triple point shows the nitrogen boiling point with changes in pressure. It also shows the saturation pressure with changes in temperature.

Nitrogen phase diagram C

At the critical point there is no change of state when pressure is increased or if heat is added.

The triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium.

Back to top

Sponsored Links

Related Topics

Related Documents

Sponsored Links

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse!

Translate
About the Engineering ToolBox!

Privacy

We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.

Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.

Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.

AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.

Citation

This page can be cited as

  • Engineering ToolBox, (2008). Nitrogen - Thermophysical Properties. [online] Available at: https://www.engineeringtoolbox.com/nitrogen-d_1421.html [Accessed Day Mo. Year].

Modify access date.

. .

close

3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Scientific Online Calculator

Scientific Calculator

3 10

Sponsored Links
.