How Do Multiple Gases Affect Pressure When Compressed into a Liquid?

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SUMMARY

The discussion centers on the behavior of gases, specifically nitrogen and oxygen, when compressed into a liquid state. It establishes that at 20 degrees Celsius, none of the gases present in the air, including nitrogen and oxygen, can be liquefied due to their critical pressures being above this temperature. The conversation highlights that as pressure increases in a container, the vapor pressure continues to rise until the conditions allow for liquefaction, which does not occur for these gases at the specified temperature.

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aarothepharo
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As we all know, the air we breath is made up of appox... 78% Nitrogen ... 21% Oxygen ... and then traces of other random things.

Lets consider that only the oxygen and nitrogen exist so that we neglect the other chemical traces.

If I were to fire up a compressor that pumps outside air into a container. we raise the pressure of the container until eventually the pressure stops to increase because the gas starts to form a liquid. But how does there being two chemicals effect the pressure of the tank. does one of the chemicals start to become a liquid but the vapor pressure of the tank continue to rise until the next chemical can become a liquid?

Out of all of the chemicals considered to be in the air (Nitrogen, Oxygen, Neon, Argon, CO2...etc.) What will become a liquid first at 20 degrees celsius?
 
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None of them. They are all above their critical pressures and can't be condensed at 20 C no matter how much pressure is applied.
 

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