Helium/Melting point: Difference between revisions
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imported>David Yamakuchi mNo edit summary |
imported>Meg Taylor m (spelling: temperture -> temperature) |
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-272.05{{Unit|°C|Helium is the only liquid that cannot be solidified by lowering the temperature. It remains liquid down to absolute zero at ordinary pressures, but will readily solidify by increasing the pressure. Helium-4 (<sup>4</sup>H) has a sharp transition temperature at 2.174K. Above this | -272.05{{Unit|°C|Helium is the only liquid that cannot be solidified by lowering the temperature. It remains liquid down to absolute zero at ordinary pressures, but will readily solidify by increasing the pressure. Helium-4 (<sup>4</sup>H) has a sharp transition temperature at 2.174K. Above this temperature it behaves as a normal liquid, but below it it expands on cooling, its conductivity for heat is enormous, and neither its heat conduction nor viscosity obeys normal rules.|http://periodic.lanl.gov/elements/2.html}}<noinclude><references/></noinclude> | ||
Revision as of 17:59, 14 February 2010
-272.05°C*†
*Helium is the only liquid that cannot be solidified by lowering the temperature. It remains liquid down to absolute zero at ordinary pressures, but will readily solidify by increasing the pressure. Helium-4 (4H) has a sharp transition temperature at 2.174K. Above this temperature it behaves as a normal liquid, but below it it expands on cooling, its conductivity for heat is enormous, and neither its heat conduction nor viscosity obeys normal rules.