A Which liquids do not supercool?

AI Thread Summary
Most liquids can supercool below their melting point, especially those without suspended particles or interfaces. However, there are exceptions, such as Helium-3 and Helium-4, which can freeze under specific conditions rather than supercool. The discussion seeks to identify liquids or classes of liquids that exhibit minimal supercooling ability, particularly those whose melting temperature closely aligns with their homogeneous nucleation temperature. The focus is on materials that can transition from liquid to solid without supercooling when cooled to their melting point. Overall, the inquiry highlights the complexities of supercooling behavior in various liquids.
thermodragon
Messages
4
Reaction score
0
TL;DR Summary
Do any liquids demonstrate absolutely no supercooling (IE they freeze reliably right at their melting point?)
It seems like having the ability to become supercooled below their melting point is the default for liquids (at least liquids without suspended particles, without many interfaces, and without other perturbations). Are there any liquids that don't supercool at all? Or if not, are there any classes of liquids that are known for having very little ability to supercool (their melting temperature is very close to their temperature of 'homogeneous nucleation')?
 
Physics news on Phys.org
I can't find a suitable source for this, but at 0.3K and 29 to 35 atmospheres pressure, Helium-3 will freeze with the addition of heat. There are more restrictive conditions where this can happen with Helium-4. These are exceptions to the normal rule of supercooling - but I don't know if they are the exceptions you are looking for.
 
That is indeed quite interesting, but it actually sounds like the opposite of the trait I'm looking for. It sounds like for He-3 and 4 there is a set of conditions for which supercooling is actually the stable state (at least if we simply define "supercooling" as being liquid while having a temperature below the melting temperature at that pressure). I'm thinking of materials which you could start with as a liquid above the melting temperature, and then remove heat until it exactly reaches the melting temperature, at which point it freezes as heat is removed before falling below the melting temperature.
 
Thread 'Question about pressure of a liquid'
I am looking at pressure in liquids and I am testing my idea. The vertical tube is 100m, the contraption is filled with water. The vertical tube is very thin(maybe 1mm^2 cross section). The area of the base is ~100m^2. Will he top half be launched in the air if suddenly it cracked?- assuming its light enough. I want to test my idea that if I had a thin long ruber tube that I lifted up, then the pressure at "red lines" will be high and that the $force = pressure * area$ would be massive...
I feel it should be solvable we just need to find a perfect pattern, and there will be a general pattern since the forces acting are based on a single function, so..... you can't actually say it is unsolvable right? Cause imaging 3 bodies actually existed somwhere in this universe then nature isn't gonna wait till we predict it! And yea I have checked in many places that tiny changes cause large changes so it becomes chaos........ but still I just can't accept that it is impossible to solve...
Hello! I am generating electrons from a 3D gaussian source. The electrons all have the same energy, but the direction is isotropic. The electron source is in between 2 plates that act as a capacitor, and one of them acts as a time of flight (tof) detector. I know the voltage on the plates very well, and I want to extract the center of the gaussian distribution (in one direction only), by measuring the tof of many electrons. So the uncertainty on the position is given by the tof uncertainty...
Back
Top