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Butterfly
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Yasaka
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729 Friendship
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JOOLA
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kosovohp



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PostSubject: Liquid hydrogen   Liquid hydrogen I_icon_minitimeWed Dec 15, 2010 2:59 pm

Liquid hydrogen (LH2 or LH2) is the liquid state of the element hydrogen. Hydrogen is found naturally in the molecular H2 form.
To exist as a liquid, H2 must be pressurized above and cooled below hydrogen's Critical point. However, for hydrogen to be in a full liquid state without boiling off, it needs to be cooled to 20.28 K[2] (−423.17 °F/−252.87°C)[3][4] while still pressurized. One common method of obtaining liquid hydrogen involves a compressor resembling a jet engine in both appearance and principle. Liquid hydrogen is typically used as a concentrated form of hydrogen storage. As in any gas, storing it as liquid takes less space than storing it as a gas at normal temperature and pressure. Once liquefied it can be maintained as a liquid in pressurized and thermally insulated containers.

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