Atmosphere around us consists of mixture gases, mainly gas is Oxygen and Nitrogen, also contains of smaller amount of Water Vapor, Argon, Carbon Dioxide and rare gases
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Composition |
Symbol |
Volume |
Temperature Degree |
Nitrogen |
N2 |
78.084 % |
-196°C |
Oxygen |
O2 |
20.947 % |
-183°C |
Argon |
Ar |
0.934 % |
-186°C |
Carbon Dioxide |
CO2 |
0.033 % |
-78°C |
Neon |
Ne |
18.20 PPM |
246°C |
Helium |
He |
5.20 PPM |
-269°C |
Krypton |
Kr |
1.10 PPM |
-152°C |
Sulfur Dioxide |
SO2 |
1.00 PPM |
-10°C |
Methane |
CH4 |
2.00 PPM |
-161.5°C |
Hydrogen |
H2 |
0.50 PPM |
-253°C |
Nitrous Oxide |
N2O |
0.50 PPM |
-88°C |
Xenon |
Xe |
0.09 PPM |
-108°C |
Ozone |
O3 |
0.07 PPM |
40°C |
Nitrous Dioxide |
NO2 |
0.02 PPM |
38.5°C |
Iodine |
L2 |
0.01 PPM |
184.3°C |
Water Vapor |
H2O |
4.0 PPM |
100°C |
Carbon Monoxide |
CO |
Trace |
-192°C |
Ammonia |
NH3 |
Trace |
-35.5°C |
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|
Composition |
Volume |
Contaminates |
Nitrogen |
99.5 % |
Argon + Oxygen |
Oxygen |
99.999 % |
Nitrogen + Water + Argon |
Argon |
99.999 % |
Nitrogen + Oxygen + Water + Acetylene |
Carbon Dioxide |
99.98 % |
Trace of Air + Hydrocarbon |
Hydrogen |
99.5 % |
Oxygen |
Acetylene |
99.999 % |
Trace of Air [ Low Level NH3 ] |
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Liquefied Gas ... |
Gases which can become liquids at normal temperatures when they are inside cylinders under pressure, they exist inside the cylinder in a liquid vapor balance or equilibrium, initially the cylinder is almost full of liquid and gas fills the space above the liquid, as gas is removed from the cylinder, enough liquid evaporates to replace it, keeping the pressure in the cylinder constant such as Ammonia, Propane, Nitrous Oxide and Carbon Dioxide |
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Non-liquefied Gas ... |
These gases do not become liquid when they are compressed at normal temperatures, even at very high pressures such as Oxygen, Nitrogen, Helium and Argon. |
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Dissolved Gas ... |
Acetylene is the only common dissolved gas, unstable chemically and can explode even at atmospheric pressure. |
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Flammable Gas ... |
This can burn or explode under certain conditions and concentration of gas in air or contact with oxidizing gas or ignition source such as Acetylene, Hydrogen, Butane and Propane |
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Oxidizing Gas ... |
Any gas include Oxygen higher than atmospheric concentrations above 23% : 25% can react rapidly and violently with combustible material such as Nitrous Oxide |