what is fractional distilliation? how does nitroge. gas get pure in form?
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The Fractional Distillation of Liquid Air :
It involves the use of turbines and high-energy refrigeration systems. Carbon dioxide and other trace gases settle out when the temperature reaches each of their sublimation or boiling points. ... Nitrogen turns back into a gas, however, because its boiling point is −196 °C.
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