At what temperature does air condense?
I was just wondering if the clean air that we breathe every day has a liquid form (I'm not talking about H2O molecules in air, I mean air itself). Obviously it does, but my question is at what temperature does the air condense into a liquid? And what would it look like? It must be lower than -89 Degrees Celsius (-129 Farenheit) cause that's the coldest temperature ever recorded...
Answer:
Air is a combination of many gases, mainly nitrogen (ca. 70%), oxygen (ca. 21%) then argon, CO2, neon, helium, hydrogen, ozone (O3), CO, SO2, krypton a.s.o. Each of these gases has a liquefaction temperature under NORMAL CONDITIONS OF PRESSURE. With the pressure increase the liquefaction temperature increases also. At the pressure of 1 bar the nitrogen liquifies at 77K or -195,8 C or -334F and the oxygen at 90,2K or -183C or -297F. You'll find slightly modified figures the more you dig in. The gas that liquifies at the lowest temperature is helium at 4K or -269C or -452F. So, going under this temperature you will be able to find the gases in liquid form. As you can see this temp is only 4K above the absolute zero which is -273,15C and will never occur through weather on Earth.
The temperature at which air condense is basically its dew point. However, this is a function of pressure. This means it will vary at different current pressure, and so at different altitudes.
The standard way is set a a prescribed pressure and you can check ASTM stardard tests. Google ASTM tests and condensation or dew point and you can get more detailed info.
The oldest temperature ever possible is -273 degrees Celsius.
CO2 solidifies at -44 degrees Celsius
O2 and N2 liquefy at -123 degrees Celsius
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Answer:
Air is a combination of many gases, mainly nitrogen (ca. 70%), oxygen (ca. 21%) then argon, CO2, neon, helium, hydrogen, ozone (O3), CO, SO2, krypton a.s.o. Each of these gases has a liquefaction temperature under NORMAL CONDITIONS OF PRESSURE. With the pressure increase the liquefaction temperature increases also. At the pressure of 1 bar the nitrogen liquifies at 77K or -195,8 C or -334F and the oxygen at 90,2K or -183C or -297F. You'll find slightly modified figures the more you dig in. The gas that liquifies at the lowest temperature is helium at 4K or -269C or -452F. So, going under this temperature you will be able to find the gases in liquid form. As you can see this temp is only 4K above the absolute zero which is -273,15C and will never occur through weather on Earth.
The temperature at which air condense is basically its dew point. However, this is a function of pressure. This means it will vary at different current pressure, and so at different altitudes.
The standard way is set a a prescribed pressure and you can check ASTM stardard tests. Google ASTM tests and condensation or dew point and you can get more detailed info.
The oldest temperature ever possible is -273 degrees Celsius.
CO2 solidifies at -44 degrees Celsius
O2 and N2 liquefy at -123 degrees Celsius
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