Android Neox, 2nd Life asked:
Can you mix water with something to stop it expanding when it freezes?
Water and glycerol have really fantastic properties. You can freeze water, as we know, at around 0°C whereas glycerol, pure glycerol, freezes at a much higher temperature. If you mix the two components together, you can actually reduce the freezing temperature to below 0. I believe at a concentration of 0.3 mole fraction, so 30% glycerol, 70% water, you can get the freezing temperature of that solution, all the way down to -45°C. now what's that doing to the actual hydrogen bonded network of water, that's exactly what we’re trying to find out, using this neutron diffraction technique.
With all due respect, I think that this answer does not really address the question. Stopping water from freezing until you reach a really low temperature is not quite the same thing as stopping it from expanding when it does freeze (at that really low temperature).
I suspect that if you can prevent water from expanding as its temperature drops below 0°C, it won't actually freeze. Geezer, Wed, 21st Sep 2011
if ice is expansive due to the ionic nature of the H2O molecules repelling each other as they slow with cooling,wouldnt a magnetic suspension additive, opposite of the H2O charge, negate the repelling effect & result in minimized expansion of ice? CZARCAR, Wed, 21st Sep 2011
The answer is no. You cannot. The Penguin, Tue, 18th Oct 2011
Yes, you can, you have to apply a lot of pressure. Bored chemist, Wed, 19th Oct 2011
Here is a lot of good information about different types of ice.
What about surrounding the water with 10 inches of solid steel and then freezing it? I'd like to see it try to expand then.. Aaron_Thomas, Sat, 22nd Oct 2011
Just a point of interest, does anyone know where you can find ice type 7 on earth? When I say ice type 7, I am referring to the diagram of the 9 ice types above.. Aaron_Thomas, Sat, 22nd Oct 2011
Is there anywhere on earth (outside of research labs) where we know that it's 17000 atmospheres pressure? I don't think the bottom of the oceans is under that pressure, but the earth's core must be. On the other hand, it's hot down there.
You put the container in dry ice. It gets cold. The water freezes. That ice takes up more space than the water so some gets forced out through the pipe,. If you feed that into a sealed container then the pressure in that vessel rises. Bored chemist, Sun, 23rd Oct 2011
There are a few. Gallium for example. Bored chemist, Mon, 24th Oct 2011