Can ice be made that is more dense than water?

  • 1 Replies
  • 5111 Views

0 Members and 1 Guest are viewing this topic.

*

Fennell, Martin

  • Guest
Can ice be made that is more dense than water?
« on: 27/09/2011 13:01:02 »
Fennell, Martin  asked the Naked Scientists:
   
Hi,

Ice (at zero degrees) is less dense than water and so floats. Presumably ice contracts as it gets colder, becoming more dense. Could we ever get ice so cold that it becomes more dense than water and then sinks?

I am not sure that it is practical to try, as presumably the water would freeze as soon as the super cold ice was put in it.

Thanks,

Martin

What do you think?
« Last Edit: 27/09/2011 13:01:02 by _system »

*

Offline lightarrow

  • Neilep Level Member
  • ******
  • 4586
    • View Profile
Can ice be made that is more dense than water?
« Reply #1 on: 28/09/2011 20:26:51 »
Fennell, Martin  asked the Naked Scientists:
Ice (at zero degrees) is less dense than water and so floats. Presumably ice contracts as it gets colder, becoming more dense. Could we ever get ice so cold that it becomes more dense than water and then sinks?

I am not sure that it is practical to try, as presumably the water would freeze as soon as the super cold ice was put in it.
According to here, ice density at normal pressure is lower than water density down to -180C:
http://en.wikipedia.org/wiki/Ice_Ih

Using much higher pressures, ice density becomes greater than water density:
http://en.wikipedia.org/wiki/Ice
http://en.wikipedia.org/wiki/High-density_amorphous_ice