Supercooling?

i know that its possible but theoretical not possible !!!!

I understand that mathematically it is impossible because 0 implies the inverse of infinity (ie: 1/(infinity) ). We could theoretically achieve 1/(1x10^ 2000) deg Kelvin, but not be anywhere close to absolute zero. "The unattainability of absolute zero" I also have heard that it is possible to attain negative absolute temperatures, but I believe it deals with quantum statistical mechanics calculations; dont know that it is a "real" (ie: measurable with a thermometer) phenomena.

Sadly for the ambitious the Laws of Thermodynamics get in the way, and a way to do it has not been found.

Supercooling simply refers to cooling a substance below its freezing point. You can take very pure water and slowly cool it, careful not to have any disturbances and, if you're lucky, get it to perhaps -1°C. Then, toss a piece of ice or salt into the water and water it suddenly freeze.

You cannot cool a substance below 0°K. Lasers are sometimes referred to as having a negative temperature, but that doesn't mean the same thing as you are probably thinking of.

Have you looked at Wiki before posting what appears to be a homework question?

Well lets see 0 ⁰K is the absence of all heat. (no such thing as cold only a perspective) so how do you get less heat than no heat? A quantum material that has to absorb some amount of heat before it responds by warming up?

Maybe Dark matter but the odds are not good

Brad

I was under the impression that one should state temperature as 0,1 etc Kelvin and not 0 DEG Kelvin, 10 Deg Kelvin etc i.e. not Deg Kelvin - is this correct ?

Quite right HoleinTheSnow.

In the SI absolute temperature has a special name named after the physisist Kelvin and the deg or its shorthand ^o is must not be used. The same applies to the imperial system where R (Rankin) is the special name.

Ok, so I write 0K and you will know it is not ok.

I use function over form, and yes I've sat on a Cray XMP and YMP.

Brad

Gosh!... to me this will be cooling the substance you are working with to a lower temperature than the neccessaraly one you really needed to achieved your purposes. This will be made by the use of a bigger evaporator or in others words with an extra heat exchanging capacity in order to achieve that supercooled effect ( Vapor-Liquid ). Latent and Sensible heat technically speaking to make a long story short. You will get it here with the help of these Pro's here at CR-4, You have the Technology,absolutly.

A Big Problem Needs A Big Fan,

MC

Hi all,

mohfar, where did you read this term? or in which context?

Maybe the reference is made to cooling to very low temperatures, near 0 K (The deg. K doesn't exist: the S.I. unit for temperature is just Kelvin. not degree Kelvin).

You cannot reach 0 K, (and even less a negative value of temperature expressed in Kelvin), it's the same problem when you try to get a speed greater than light speed, getting a negative mass or a friction factor greater than unity: physic laws.

Kind regards