At what temperature does water freeze? Detailed answer

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At what temperature does water freeze? Detailed answer

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At what temperature does the water freeze?

The answer to this question seems obvious - at 0 degrees Celsius - but it is not entirely correct.

If very pure (preferably distilled) water is subjected to slow cooling, then it can remain liquid even at a temperature of several degrees below zero. However, if a small piece of ice, a pinch of snow or just dust is thrown into this supercooled water, the water will instantly freeze, growing into long crystals throughout the volume.

Such a strange behavior of water is explained by the peculiarities of the crystallization process. The transformation of a liquid into a crystal occurs primarily on impurities and inhomogeneities - dust particles, air bubbles, scratches on the walls of the vessel.

Pure water is practically devoid of crystallization centers, so it can be supercooled (and quite strongly), while remaining liquid. There is a case when the contents of a bottle of narzan well-cooled in the freezer, opened on a hot summer day, instantly turned into a piece of ice. Under laboratory conditions, the water temperature, however, in very small volumes, could be brought to -70 degrees Celsius.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

What is cancer?

You probably know from the appeals of cancer organizations and from the results of all the studies conducted in this area that this disease is the biggest threat to the health and life of mankind. We will talk about cancer only in general terms, so that you can get an idea of \uXNUMXb\uXNUMXbthis disease.

Cancer is a persistent malignant tumor. Its cells spread throughout the body and end up in parts that can be quite far from where the tumor first appeared. If they are not removed or destroyed in time, then cancer leads to the death of a person.

New cells are constantly being added to our body. They grow, wear out and die, and in their place exactly the same ones are formed. But cancer cells look and function very differently. They look like young cells in the part of the body where they originate, but under a microscope, you can see the differences.

Then the cancer cells divide, their number increases, but they never grow, they just stop reproducing. They multiply until they become harmful to the body.

As they grow, they do not stay in one place, but move among normal cells. Finally, there are so many of them that they crowd out the ordinary ones, which are now not only able to function normally, but also to survive. Through the blood, cancer spreads to different parts of the body. There it grows and interferes with the activity of organs.

If you do not stop the growth and spread of a malignant tumor, then the person will die. That is why periodic examination is so necessary for detection and treatment before the disease has gone too far.

Cancer is not transmitted from person to person. No remedy has yet been found to effectively treat this disease. Therefore, one of the most important goals of medicine is to fully understand the nature and causes of cancer and find a way to prevent and treat it.

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