The physical and chemical properties of nitrogen (N2)
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- Time of issue:2018-11-05 19:21
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The physical and chemical properties of nitrogen (N2)
(Summary description)
- Categories:Industry News
- Author:
- Origin:
- Time of issue:2018-11-05 19:21
- Views:82
The physical and chemical properties of nitrogen (N2)
1. Under normal temperature and pressure, nitrogen is a colorless, odorless and odorless inert gas. Nitrogen accounts for about 78.1% in the air. Liquid nitrogen is also colorless and odorless, more than
The water is light. Does not burn in the air. It is inert at room temperature, but it synthesizes ammonia with cyanide under high temperature and high pressure when there is a catalyst.
2. Decompression discharge can get active nitrogen. Synthesize nitrides (Mg3N2, Cu3N2, etc.) at high temperature and metallization. React with calcium carbide at 1000℃
Generates ammonia and calcium.
3. Slightly soluble in water, alcohol and ether.
4. The molecular weight of nitrogen is 28.0134, the melting point (triple point, 12.53kPa) is -210.0°C, and the liquid density (-210.0°C, 12.534kPa)
It is 869.5kg/m³, and the thermal conductivity (100kPa, 280K) is 0.02447W/(MK).
5. Nitrogen itself is non-toxic and non-irritating, and the inhaled nitrogen is discharged through the respiratory tract in its original form.
6. Safety protection. Nitrogen should be stored in pressurized steel cylinders, and liquid nitrogen should be stored and transported in insulated containers and tank trucks. Nitrogen is non-corrosive, and the container material is
Carbon steel, stainless steel, copper, copper alloy, aluminum and other general metals and common plastic materials can be used at room temperature; nickel can be used for liquid nitrogen
Steel (90% Ni), stainless steel, copper, brass and precious bronze. Polytetrafluoroethylene and polychlorotrifluoroethylene polymers can be used at low temperatures.
When a fire occurs, nitrogen can be used to extinguish the fire. Nitrogen can be discharged into the atmosphere.
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