2007-09-20 09:01:38 · 11 answers · asked by Hector 2 in Science & Mathematics ➔ Chemistry
I know it's 4.22K,
Which is -268.93C.
Which is -452.074F
2007-09-20 09:05:46 · answer #1 · answered by tinned_tuna 3 · 0⤊ 2⤋
Freezing Point Of Helium
2016-12-13 06:50:45 · answer #2 · answered by ? 4 · 0⤊ 0⤋
http://en.wikipedia.org/wiki/Helium
Helium solidifies only under great pressure. The resulting colorless, almost invisible solid is highly compressible; applying pressure in the laboratory can decrease its volume by more than 30%.[2] With a bulk modulus on the order of 5×107 Pa[3] it is 50 times more compressible than water. Unlike any other element, helium will fail to solidify and remain a liquid down to absolute zero at normal pressures. This is a direct effect of quantum mechanics: specifically, the zero point energy of the system is too high to allow freezing. Solid helium requires a temperature of 1–1.5 K (about −272 °C or −457 °F) and about 25 bar (2.5 MPa) of pressure.[4] It is often hard to distinguish solid from liquid helium since the refractive index of the two phases are nearly the same. The solid has a sharp melting point and has a crystalline structure.
Solid helium has a density of 0.214 ±0.006 g/ml (1.15 K, 66 atm) with a mean isothermal compressibility of the solid at 1.15 K between the solidus and 66 atm of 0.0031 ±0.0008/atm. Also, no difference in density was noted between 1.8 K and 1.5 K. This data projects that T=0 solid helium under 25 bar of pressure (the minimum required to freeze helium) has a density of 0.187 ±0.009 g/ml.[5]
2007-09-20 09:12:01 · answer #3 · answered by JS 3 · 0⤊ 0⤋
Helium Freezing Point
2016-09-29 04:11:25 · answer #4 · answered by ? 4 · 0⤊ 0⤋
I sure wish I had the Internet at my disposal when I was your age. In those days, very few people even had computers. If I wanted to look up something, I had to go to the library and often spend hours looking for what I needed in books, magazines, microfiche, and microfilm. I usually had to go through drawers of cards to look up these books, too. It was tedious and often frustrating, especially if I couldn't find what I was looking for.
2007-09-20 09:14:29 · answer #5 · answered by RoVale 7 · 0⤊ 2⤋
It's in a book someplace!, So look it up!
2007-09-20 09:07:24 · answer #6 · answered by THE Cupid HATER 7 · 0⤊ 2⤋
about −272 °C or −457 °F
2007-09-20 09:05:34 · answer #7 · answered by b n r 2 · 1⤊ 1⤋
do your own homework genius.
Cheating is against Yahoo TOS
2007-09-20 09:04:46 · answer #8 · answered by Talamascaa 4 · 0⤊ 3⤋
http://en.wikipedia.org/wiki/Helium
okay there is the link, READ!!!!!!!!!!!!!!!!!!
you will find all the other information you may or may not need
2007-09-20 09:10:36 · answer #9 · answered by steven m 7 · 0⤊ 2⤋
-272.05°C -458°F
2007-09-20 09:07:10 · answer #10 · answered by Anonymous · 2⤊ 0⤋