Author Options:

absolute zero Answered

I just had a thought, at absolute zero does everything turn into a solid? since nothing's moving would it be a solid? Would gases such as helium solidify at low pressures? Etc.


ok by absolute zero im guessing we dont mean 0 degrees farenheight...

absolute zero in farenheit is about -459 degrees

ohhh wow i thought you were taking a break from instructables? glad to see your back

Some scientist almost got to absolute zero and stopped light from moving.

It is interesting to note that, at "close to absolute zero" certain metals become superconductors, thus actually making the movement/conductance of electrons more free. Weird things happen around those temps.


10 years ago

Hey I know this is really late but I have learned some stuff in class recently and ran into your post while finding out more about it. Helium for example turns into a state of matter called Bose-Einstein condensate/a super atom/super fluid. The answer in this link gives a great explanation of what happens :http://answers.yahoo.com/question/index?qid=20071205041143AAjeFUE&show=7

"Helium has two isotopes 4He and 3He (first has two protons and two neutrons in its nucleys and the second has two protons and only one neutron). 4He solidifies below ~1.5K at pressure above 24 atm. It packs in cubic crystal lattice like CsCl or Cu (depending on pressure). At normal pressure (1atm) it becomes superfluid (fluid without viscosity, can crawl out of the container it is poured into).
3He will solidify at ~1K and pressure above 35atm. Otherwise it also turns into superfluid.
Liquid helium is still irreplaceable in modern science. All more or less sensitive magnetic instruments (NMR for example) use liquid helium to cool either superconductors or to create very low temperatures.
Just for the info, the record cold temperatures reached up to date is 5x10(-10)K (half-a-billionth of a degree above absolute zero). So, although we do not know what exactly happens to He at 0K, we can assume quite accurately that probably nothing happens to it that we have not seen already at slightly higher temperatures."

My chem teacher explained it as a blog of atoms and such. It can flow through materials atoms usually cannot pass though. It's so cool!

I would say so. Is anyone able to give a brief rundown of BEC for me? I had a hard time understanding it.


10 years ago

I would think you'd get a sort of Schrodenger's cat situation. Whether it's REALLY solid or not would depend on things like the amount of inter-molecular attraction, but if you, like, POKE it to see if it moves like a liquid, then POOF, you're not at absolute zero any more!


10 years ago

I believe that everything would have to be solid, though since it is impossible to get to exactly "absolute zero"....

. Depends on how you define solid - almost as many definitions as there are dictionaries. If one uses: A state of matter where the molecules are not free to move. - www.natureshift.org/robotLab/glossary.html, then I'd say everything is a solid at absolute zero (The theoretical lowest temperature possible at which all molecular motion ceases. - www.visionlearning.com/library/pop_glossary_term.php).