You can freeze water by heating it? apparently

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    Heating Water
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Discussion Overview

The discussion revolves around the phenomenon of freezing water through heating and pressure changes, particularly in the context of a physics investigation. Participants explore concepts related to temperature, pressure, and the behavior of water and ice under varying conditions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant recalls a process involving a machine that creates ice by heating water under specific pressure conditions, possibly related to the "double point of water."
  • Another participant suggests that heating water could distill it, making it more pure and thus lowering its freezing temperature.
  • A question is posed about whether compressing water enough could alter its molecular structure to form a thick ice.
  • A later reply discusses how applying pressure to ice can cause it to melt, which is relevant in activities like skating and curling, and mentions that reducing pressure on water at 0 degrees Celsius can lead to rapid freezing.
  • It is noted that if the temperature of water cannot be lowered below freezing, reducing the pressure sufficiently can cause it to freeze, with a mention of latent heat affecting the melting process when pressure is reapplied.

Areas of Agreement / Disagreement

Participants express various ideas and hypotheses about the relationship between temperature, pressure, and the phase changes of water and ice. There is no clear consensus, and multiple competing views remain regarding the mechanisms involved.

Contextual Notes

There are limitations in the discussion, including unclear definitions of terms like "double point of water," and unresolved details regarding the specific conditions under which these phenomena occur.

Who May Find This Useful

This discussion may be of interest to students and researchers in physics, particularly those exploring thermodynamics, phase transitions, and the properties of water and ice under varying conditions.

wickedsingh
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Well i am doing my physics investigation about temperature, and need an interesting effect that takes place at a precise temperature. I remember watching this thing ages ago on discovery. It was about mining and they needed large quantities of ice. So instead of making it by the normal process they did it another way.

There was this huge machine that looked like a mixer. I think it was under high pressure aswell, or it might be low pressure, and they said the ice was made by heating water and doing something to it. As you can see i recall very little. I think it was called the double point of water or something similar.

Does anyone know about this? Please help
 
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heating the water to distill it and make it more pure so it has a lower freezing temp?
 
if you compress water enough, will the molecular structure break and reform as a very thick ice?
 
wickedsingh said:
Well i am doing my physics investigation about temperature, and need an interesting effect that takes place at a precise temperature. I remember watching this thing ages ago on discovery. It was about mining and they needed large quantities of ice. So instead of making it by the normal process they did it another way.

There was this huge machine that looked like a mixer. I think it was under high pressure aswell, or it might be low pressure, and they said the ice was made by heating water and doing something to it. As you can see i recall very little. I think it was called the double point of water or something similar.
When you put greater pressure on ice (as in skating) it melts. That is very important in skating and curling, for example - and in driving on snow near 0 deg. C.

Conversely, when you reduce pressure on water at 0 degrees, it freezes more rapidly. If you can't get the temperature of water down below freezing, just reduce the pressure enough and it will turn to ice. When you reapply normal pressure, it will start to melt but the latent heat of water means that it will not melt immediately.

AM
 

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