Physics question?

[Shimon]

I was thinking about this problem today and could use some help.

If you had a very solid sphere full of water and lowered the temperature so the water would (normally) freeze and the the sphere was as indestrucable as possible...would the water freeze since it has no room to expand? Or would the pressure just rise in the sphere and water stays in liquid form? I remember PV=T from school so I would guess that since volume is contant and temperature is decreased then pressure must go up. So, I would guess the water would not freeze. Am I right? (Sorry, but these kinds of things keep me up at night).

Thanks!

 

[Highbeam]

PV=NRT, as we always called pivnert, only applies to gasses and has no value here.

I think it would freeze solid but under great pressure. The intense pressure would seem to encourage the lower energy state of a solid.

 

[Bully]

I happens to me all the time, when I supercharge a beer in the freezer, then open it up. I'll get about one sip then it will freeze up /forums/images/graemlins/frown.gif now I rub the can on the back of my neck first. cools me off, and warms the beer a little /forums/images/graemlins/wink.gif

 

[Farmwithjunk]

</font><font color="blue" class="small">( I happens to me all the time, when I supercharge a beer in the freezer, then open it up. I'll get about one sip then it will freeze up /forums/images/graemlins/frown.gif now I rub the can on the back of my neck first. cools me off, and warms the beer a little /forums/images/graemlins/wink.gif )</font>

Applied physics in it's truest form^

 

[daedong]

<font color="blue"> If you had a very solid sphere full of water and lowered the temperature so the water would (normally) freeze and the the sphere was as indestrucable as possible...would the water freeze since it has no room to expand? Or would the pressure just rise in the sphere and water stays in liquid form? </font>


It won't freeze

 

[hazmat]

You need to look at the phase diagram
simple phase diagram

1 atm = 14.7 psi

complex phase diagram

1 Pa = 1.45x10e-4 psi
1 MPa = 10e6 Pa

Theoretical answer - if you could make your sphere infinitely rigid - it would freeze at ~10e9 Pa = 1.45 million psi

Practical answer - your sphere will either stretch a little or break allowing the water to freeze at more modest temperature & pressure

 

[Soundguy]

Will disolved gas content effect this any? ( lower that freezing pressure a tad? )

Soundguy

 

[Holzster]

Bully

I I still laughing