Solid Hydrogen

[potterfan3]

Where can get some?

[HWKE]

You can't. Hydrogen does not even become liquid until you reach -260 degrees celsius.

[CheekyChops]

Hydrogen is a gas and therefore by definition, not solid.

[CT]

Freeze some water. That is effectively 2/3 solids Hydrogen. lol

[newtron]

In terms of mole,you are correct. In terms of mass, water is about 1/9 hydrogen.

[HWKE]

CheekyChops. Hydrogen is only a gas in its natural state at room temperature. To say Hydrogen is a gas and therefore not solid is like saying iron is a solid, therefore we can't melt it and form a liquid.

[jake-the-peg]

Make some yourself

Here's the recipe
http://www.grc.nasa.gov/WWW/RT1999/5000/5830pa laszewski1.html

[CheekyChops]

Good point, HWKE!

[chakka35]

An everyday example of a substance which can be gas, liquid or solid within a narrow range of temperatures is water.
Liquid at room temperature, gas at 100C and solid at 0C.

[Skreecheeboy]

From what my chemistry teacher told us, hydrogen might not even become a liquid at that temperature, it might just become a solid, don't know if that's true or not but there you go!

[stewey]

You can,t. Since you posted your question, everybody wants some. So it's all solid out

[HWKE]

Skreecheeboy. Hydrogen will become a liquid before it becomes a solid. The exact temperature is said to be
-252.87 degrees celcius, but it must be pressurised. It is used in liquid form as rocket fuel.
http://en.wikipedia.org/wiki/Liquid_hydrogen

[Beohthram]

you could always try the liquid hydrogen store down the road from me. sounds like something theyd stock...

[Thicko2006]

Try ebay.

[theprof]

Hydrogen in the gaseous phase liquefies at �252.9 degrees Celsius. The liquid phase changes to the solid phase at �259.3 degrees Celsius. Note that both of the figures quoted are for one atmosphere pressure.

In addition, between �269 degrees Celsius and �272 degrees Celsius, Hydrogen exists in a specific crystalline form with unusual properties.

HWKE, Skreecheeboy is fortunate in having a very learned chemistry teacher. Following the work of McGrady et al in the University of New Brunswick, it has since been shown that it is possible to convert gaseous Hydrogen to solid Hydrogen without it undergoing the liquid phase using specialised methods. Certain research papers on this subject are available via Ingenta etc. for those with access to university library databases online via the usual methods. I recently read a fascinating paper awaiting publication on this very subject by a fellow scientist at a certain government research facility.

Doin�t believe everything you read in Wikipedia. Wikipedia is an anathema to all professional scientists the world over. The concept that an information source should be allowed to be freely editable by users to include fact and fiction alike reduces the credibility of the source at a stroke, problems freely acknowledged by Wikipedia�s founder, Jimmy Wales. Furthermore, it is to be noted that the article cited acknowledges that sources and references are missing. .

Incidentally, the figures I�ve quoted above come from Patnaik�s �Handbook of Inorganic Chemicals�, a standard reference source for chemists worldwide. Hawley�s Condensed Chemical Dictionary provides the similar figures.

Potterfan3, we use solid Hydrogen for a number of research purposes. However, even for bona fide users, solid Hydrogen requires specialised storage, transportation and handling methods.

It's simply not viable.

[macspeedy]

chemically liquid hydrogen can be made at room temperature in the form of a wet fart

[Peter Pedant]

as a pen pusher who read mediaeval French,

going from solid to vapour without liquefying used to be called sublimation. Iodine does it alot - it's amazing what you pick up between Princesse de Cleves and Racine, - is there something in the phase diagram of hydrogen that makes this a big deal ?

[HWKE]

The Prof
Please read the question I gave the answer to.
The question was NOT does it exist under laboratory conditions.
With the quote from the chemistry teacher to Skreecheeboy Hydrogen might not even become a liquid, it might become a solid at this temperature'
You will notice I gave the answer in terms of the question, rather than to score points by saying, yes it is possible to have momentary instances of solid hydrogen form on liquid helium etc. because it was not in my opinion when answering the question, what the poser of the question was asking.

[potterfan3]

theprof did actually say it wasn't viable at the end of all that. That answered my questioned, which I knew already...

[Laykie]

potterfan3, I'm assuming you knew that already because HWKE told you so at the beginning.

Sounds to me like TheProf is one of those people who likes to say 'a fellow scientist' and 'I have read a paper, not yet ready for publication' because I am so important type people.

[potterfan3]

no.. i knew before i even asked the question that you have to have it and keep it really really cold. Which I can't really do. theprof was just answering the question in more detail and expanding on points already made