What is the temperature? Will water turn into ice when spilled?

The temperature should be below MINUS 40 degrees Celsius.

In fact, the principle of water splashing into ice is the same as that of cloud formation, which is a process from unsaturated to saturated and then to precipitation. Theoretically, if the temperature is below 0 degrees Celsius, as long as the water cools in the air for a long time, the lower the air temperature, the faster the ice will freeze.

But in fact, the basic condition for instantaneous freezing of water droplets is that the temperature is below -40℃. The lower the temperature, the better the effect, and the higher the water temperature, the better the effect (boiling water is the best). Neither warm water nor cold water can have this effect.

Extended data:

There are two physical changes when water drops turn into ice. Water droplets freeze at low temperature, become larger, and release latent heat energy. The latent heat energy released by water droplets is from the outside to the inside, and the outer layer of water droplets freezes first, and then gradually freezes inward. The lower the temperature, the faster the freezing speed of water droplets; At the same temperature, the smaller the water droplets, the easier it is to freeze.

When the temperature is lower than -40℃, although the basic conditions for water droplets to freeze are met, it is likely that the spilled water will still fall to the ground in the form of "water". Because the outer layer of countless spilled water droplets freezes quickly, but there is still water inside, it will take some time for the water droplets to freeze completely. When water splashes into ice, the diameter of water droplets is too large, and the time from the air to the ground is too short to completely freeze into solid ice.

But the water droplets splashed on the ground can be frozen into real ice in a few minutes.

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