Compressing Hydrogen - at what pressure does hydrogen liquify ?

Sorry for Newbie question but I am finding trouble finding the answers on
the internet. (I am not a physisist or chemist)

Q: Does anyone know at what pressure hydrogen liquifies ?

Dear steve mew:

"steve mew" wrote in message
...
Sorry for Newbie question but I am finding trouble finding the answers on
the internet. (I am not a physisist or chemist)

Q: Does anyone know at what pressure hydrogen liquifies ?

http://environmentalchemistry.com/yogi/periodic/H.html
also know as its boiling point...

David A. Smith

steve mew (or somebody else of the same name) wrote in message
thusly:

Sorry for Newbie question but I am finding trouble finding the answers on
the internet. (I am not a physisist or chemist)

Q: Does anyone know at what pressure hydrogen liquifies ?

At room temperature hydrogen will not liquify whatever the pressure. At high
enough pressure it will pass from gas straight to solid.

--
Paul Townsend
I put it down there, and when I went back to it, there it was GONE!

Interchange the alphabetic elements to reply

"Prai Jei" wrote in message
...
steve mew (or somebody else of the same name) wrote in message
thusly:

Sorry for Newbie question but I am finding trouble finding the answers
on
the internet. (I am not a physisist or chemist)

Q: Does anyone know at what pressure hydrogen liquifies ?

At room temperature hydrogen will not liquify whatever the pressure. At
high
enough pressure it will pass from gas straight to solid.

It is never as simple as we would like it to be:

at elevated pressures metallic hydrogen solidifies:
http://militzer.gl.ciw.edu/diss/node5.html

comparing ortho-hydrogen and para-hydrogen (dependence on the orientation of
nuclear magnetic moments)
http://www.ictp.trieste.it/~pub_off/.../smr999/26.pdf

Try a web search as soon as the question has been clarified.


Tom Davidson
Richmond, VA