Mysterious Ice Cube Tray Phenomenon

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Discussion Overview

The discussion revolves around a phenomenon observed with a large ice cube tray where water did not freeze after several hours in a freezer. Participants explore the reasons behind the lack of freezing and the subsequent transformation of the water into a snow-like consistency upon agitation.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant notes that the water remained unfrozen after 6 hours, questioning the cause of this phenomenon.
  • Another participant suggests that the freezer may be poorly operating, contrasting their experience of faster freezing times.
  • Some participants propose that the water was in a supercooled state, where it remains liquid below its freezing point until disturbed.
  • It is mentioned that the act of swirling the water may have initiated the freezing process through seeding, allowing the water to crystallize into a snow-like consistency.

Areas of Agreement / Disagreement

Participants express differing views on the cause of the phenomenon, with some attributing it to freezer performance and others to the supercooled state of the water. No consensus is reached on the definitive explanation.

Contextual Notes

The discussion includes assumptions about freezer efficiency and the purity of water, which may influence the freezing process. The concept of supercooling is referenced but not fully explored in terms of its implications.

ax0
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I'm sure this is a totally amateur question, but today I got one of those big ice cube trays for 2x2x2 inch cubes. I filled it up and put it in my freezer, and about 6 hours later checked on it but the water was not frozen at all. Not even a crust on top. I put my finger in one of the squares and swirled it and in that moment the purely liquid water became a snow-like consistency. I did it again with the other squares and the same thing happened. What causes this?
 
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ax0 said:
I put my finger in one of the squares and swirled it and in that moment the purely liquid water became a snow-like consistency. I did it again with the other squares and the same thing happened. What causes this?

a very poorly operating freezer ... my cubes would be solid ice after 2 - 3 hours
a 1.25 bottle of coke will freeze for me in a couple of hours
 
ax0 said:
I put my finger in one of the squares and swirled it and in that moment the purely liquid water became a snow-like consistency. I did it again with the other squares and the same thing happened. What causes this?

Sounds like the water was in a supercooled state. https://en.wikipedia.org/wiki/Supercooling
 
ax0 said:
Not even a crust on top. I put my finger in one of the squares and swirled it and in that moment the purely liquid water became a snow-like consistency.

Drakkith said:
Sounds like the water was in a supercooled state. https://en.wikipedia.org/wiki/Supercooling
yes and the adding of the finger to stir it added the seeding process for it to freeze
reasonably pure water can be lowered below its freezing point without freezing ... till seeding occurs
 

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