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What element has the lowest freezing point and what is its freezing point?

Question #69189. Asked by greyhound_girl.
Last updated Apr 02 2023.

Related Trivia Topics: Sci / Tech  
Brainyblonde
Answer has 31 votes
Currently Best Answer
Brainyblonde
24 year member
1455 replies

Answer has 31 votes.

Currently voted the best answer.
The chemical element with the highest melting point is tungsten, at 3695 K (3422 °C, 6191 °F). The often-cited carbon does not melt at ambient pressure but sublimates at about 4000 K; a liquid phase only exists above pressures of 10 MPa and estimated 4300–4700 K. Tantalum hafnium carbide (Ta4HfC5) is a refractory compound with a very high melting point of 4488 K (4215 °C, 7619 °F).[1] At the other end of the scale, helium does not freeze at all at normal pressure, even at absolute zero.
link https://en.wikipedia.org/wiki/Melting_point

Aug 02 2006, 3:06 PM
greyhound_girl
Answer has 0 votes
greyhound_girl

Answer has 0 votes.
right, but liquid helium freezes at what temperature?
I knew Hydrogen froze at less than one degree above 0k (absolute zero) but what about Helium, what's its freezing point?

Aug 02 2006, 3:58 PM
Brainyblonde
Answer has 14 votes
Brainyblonde
24 year member
1455 replies

Answer has 14 votes.
Helium is the most difficult of all gases to liquefy and is impossible to solidify at atmospheric pressure. These properties make liquid helium extremely useful as a refrigerant and for experimental work in producing and measuring temperatures close to absolute zero. Liquid helium can be cooled almost to absolute zero at normal pressure by rapid removal of the vapor above the liquid. At a temperature slightly above absolute zero, it is transformed into helium II, also called superfluid helium, a liquid with unique physical properties. It has no freezing point, and its viscosity is apparently zero; it passes readily through minute cracks and pores and will even creep up the sides and over the lip of a container. Helium-3, the lighter helium isotope of mass 3, which has an even lower boiling point than ordinary helium, exhibits markedly different properties when liquefied. See Superfluidity.
[encarta.msn.com/encyclopedia_761562418/Helium.html]

link http://www.uky.edu/~garose/helium


Response last updated by gtho4 on Apr 02 2023.
Aug 02 2006, 4:07 PM
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