Freezing time for 1mL of water

In summary, the conversation is discussing the freezing time of a fixed volume of water at a given temperature and pressure when placed in a freezer with a temperature below 0 degrees Celsius. The speaker mentions that there is no formula for this and that the freezing time depends on various factors such as the shape of the vessel and the airflow in the freezer. They suggest determining the freezing time experimentally or using approximations based on similar setups.
  • #1
Usjes
9
0
Hi,

Does anyone have a formula for the freezing time (ie time taken for it to freeze) of a fixed volume of water (1mL) at a given temperature (Ts) and pressure (1 Atmosphere) when the surrounding temperature is set to below 0 Celsius (Ta < 0C) ?

ie. I'm looking for Time to freeze if you place a sample with initial temperature (Ts) in a freezer whose internal temp is Ta.

Thanks,

Usjes
 
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  • #2
There are no such formulae, and the time do not scale with the volume nor even with freezer temperature. It depends on multiple factors, especially shape of the vessel containing water, thermal properties of the vessel, and shape of the interior of the freezer, as it in turn determines the airflow of cold air around your sample.
In practice there is no better way than to determine it experimentally for your particular shapes, or estimate it by first order approximations, if you have experimental data for similar setup.

You may check importance of these factors with your kitchen freezer and icecube forms: the time needed to freeze them may vary by factor of three or more depending on which shelf of the freezer you put them.

For bigger vessels of simple shape (eg. a spherical one of the radius of several cm)it might be a bit easier to predict freezing time, as the most limiting factor in such case is thermal conductivity of the already formed ice, which may be modeled.
 

1. How can you freeze 1mL of water?

To freeze 1mL of water, you can place it in a freezer at a temperature of 0 degrees Celsius or below. This will cause the water to solidify and become ice.

2. How long does it take to freeze 1mL of water?

The time it takes to freeze 1mL of water will depend on the temperature of the freezer and the container the water is in. Typically, it will take a few hours for 1mL of water to freeze in a standard home freezer.

3. Can you speed up the freezing process?

Yes, you can speed up the freezing process by lowering the temperature of the freezer or using a smaller container for the water. This will increase the rate of heat transfer and cause the water to freeze faster.

4. What happens to the water molecules during freezing?

During freezing, the water molecules lose energy and slow down, causing them to form a more organized structure and become solid. This process is known as crystallization.

5. Can you freeze 1mL of water in any container?

Yes, you can freeze 1mL of water in any container as long as it is able to withstand the low temperatures of the freezer. However, using a container specifically designed for freezing, such as an ice cube tray, may result in more uniform and easier to handle ice cubes.

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