<P> To exist as a liquid , H must be cooled below hydrogen 's critical point of 33 K . However , for hydrogen to be in a fully liquid state without boiling 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 . 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 . However , the liquid density is very low compared to other common fuels . Once liquefied , it can be maintained as a liquid in pressurized and thermally insulated containers . </P>
<P> To exist as a liquid , H must be cooled below hydrogen 's critical point of 33 K . However , for hydrogen to be in a fully liquid state without boiling 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 . 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 . However , the liquid density is very low compared to other common fuels . Once liquefied , it can be maintained as a liquid in pressurized and thermally insulated containers . </P>
at what temperature does hydrogen become a liquid
at what temperature does hydrogen become a liquid
20.28 K ( − 423.17 ° F / − 252.87 ° C )
20.28 K ( − 423.17 ° F / − 252.87 ° C )