Ice desnity change?
Answer:
Normally a solid will keep approximately the same density when you change the temperature. There is a slight dilatation though. Water ice behaves like that as well. You might find the dilatation coefficient (usually about a few 10-6 per K) in a physics handbook.
There is another thing that you will perhaps be interested in : if you change the pressure a lot, then at some point the ice will re-crystallise in a different, denser way. The new ice is called ice II. I believe you can get ice III, ice IV... if the pressure keeps rising.
You eventually get ice XI by going to very low temperatures at ambient pressure, but its density is the sane as normal ice.
http://www.lsbu.ac.uk/water/phase.html...
Ice XI has the same density as Ice I (0.92g/cm^3). So the answer is no. Not without a pressure change.
Ice will remain frozen as long as it is ice at 0°C and colder.
The colder it gets (it can be cooled further to any temperature below 0°C) and, as it cools, it continues to expand therefore decreasing further in density.
Density of water from liquid to solid (ice) changes because water molecules expand at low temperatures. The solid water or the ice has spaces in between molecules that's why it floats (imagine putting an ice into liquid water). The density of the ice is lighter than its liquid state. As known, freezing point of water is 0 deg C. Above this temperature, the density is heavier; below this temperature, it is lighter.
Many years ago, a company offered an electronic ice junction for thermocouple references. It used as a control, a small bellows controlled switch. As the water froze, that was zero degrees.As it went slight cooler, there was a slight density change which cut the power. It was quite accurate but no longer necessary with modern electronics and accurate thermisters providing an electronic ice junction compensation.
no
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