Liquefaction of gases includes several stages necessary for the gas translation in a liquid state. These processes are used for scientific, industrial and commercial purposes. Many gases can be brought to a liquid state by simple cooling with a normal atmospheric pressure, others as, for example, carbon dioxide, demand for this purpose as well increase of pressure. Liquefaction is used for studying of fundamental properties of molecules of gas (for example, intermolecular forces of interaction), for storage of gases. Gases are liquefied in special condensers which absorb warmth of steam formation, and transferred to a gaseous state in evaporators where warmth of steam formation is distinguished.
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The liquefied gases