Tags: Chemical Compound, Chemical Substance.
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 cooled below hydrogen’s critical point of 33 K. However for hydrogen to be in a full liquid state without evaporating at atmospheric pressure it needs to be cooled to 20.28 K (−423.17 °F/−252.87°C). One common method of obtaining liquid hydrogen involves a compressor resembling a jet engine in both appearance and principle.
