Why does water turn into ice when it gets cooler?

The first thing is to see what the water is. If it is absolutely pure water, it will not freeze even if it is tens of degrees below zero.

Everyone forgets an important point. The premise for water to freeze is that it must reach the water's freezing point. And there are enough condensation nuclei in the water to freeze. There is also the fact that the water is in an unstable state.

As is the case in the Arctic, the seemingly calm surface of the water begins to condense when a solid is thrown into the water. At first, the water did not freeze because there were no condensation nuclei and the liquid was in a relatively stable state. When the stone is thrown in, it disrupts the original stable state.

Causes icing. There is also artificial rainfall and snowfall, which is actually the release of dry ice (solid carbon dioxide) into the air.

When the air is cold enough and solid particles are added, the moisture starts to condense, and when the temperature is high, it is rain, and when the temperature is low, it is snow.

0 degrees is a limit temperature, at 0 degrees, the ice-water mixture is in a special state, at this time, it does not matter who has more water and who has less, and how much proportion each has. Scientifically speaking, as long as it is at one atmospheric pressure, the temperature when the ice-water mixture is in a stable state is 0 degrees. At one atmosphere, the temperature at which water vaporizes is 100 degrees.

At 0 degrees Celsius, the water will turn into ice because it reaches the freezing point of the water. At this temperature, water changes from a liquid state to a solid state, and the solid state of water is called ice.

Because the freezing point of water is 0 degrees Celsius. So when the temperature drops to 0 degrees, the form of the water changes from liquid to solid ice.

Water freezing is a physical change in solidification, and microscopically speaking, it is just that the water molecules change from a relatively scattered arrangement to a compact one. When the temperature of water decreases, the process of changing the substance from a liquid state to a solid state, and the temperature at which the substance solidifies is called the freezing point. Almost all known liquids can solidify into solids at low temperatures.

The melting point of water at one atmosphere is very close to 0, and if there is a nucleating agent, its freezing point will be very close to the melting point, but if there is no nucleating agent, the water will be supercooled below 0, and it will not form ice until 40. At a high pressure of 2,000 atmospheres, the water is in a supercooled state until 70.

Have you ever seen the whole process of a drop of water forming ice? Obsessive-compulsive disorder was cured by it.

Water in nature has three states: gaseous, solid and liquid. The liquid state is called water, the gaseous water is called water vapor, and the solid water is called ice. The heat of melting of ice is that water is a special liquid.

It is at its highest density at 4. The temperature is above 4, and the liquid water obeys the general law of thermal expansion and contraction. 4 Below, among the condensation molecules that were originally distributed in a linear pattern in water, there is an ice-like association molecule like an ice crystal structure, which is called"Fake ice crystals".

Because the density of ice is smaller than that of water, the existence of "false ice crystals" reduces the density of water, which is why water is the highest density at 4, and the density below 4 is the secret. The association of water molecules in natural ice is arranged according to the rules of the hexagonal crystal system. The simplest example of a crystalline lattice is a tightly packed set of bricks, and if a hypothetical atom is substituted at the center of these bricks, a crystalline lattice is obtained.

The crystal lattice of ice is a triangular prism with a crust, and the oxygen atoms on the six corners are common to the six adjacent unit cells. The oxygen atoms on the three edges are shared by three adjacent unit cells, and the two axial top oxygen atoms are shared by each of the two unit cells, and only one oxygen atom is unique to the unit cell.

At standard atmospheric pressure, the freezing point of water is 0. In general, the temperature at which water turns into ice needs to be below 0. Water is an inorganic substance composed of hydrogen and oxygen, with the chemical formula HO, and is a colorless and odorless transparent liquid at room temperature and pressure.

Ice is a crystallization formed by the orderly arrangement of water molecules.

What is ice

Ice is a colorless and transparent solid, formed by the solidification of a liquid, which is condensed in a frozen environment. In an atmospheric environment, the melting point of ice is 0. 0 When water freezes into ice, it increases in volume by about 1 11.

Ice will liquefy and dissolve when exposed to high temperatures, which is a normal natural phenomenon that can be formed naturally or artificially. The molecules are mainly bonded by hydrogen, but there are also van der Waals forces, and the lattice structure is generally hexagonal, which is less dense than water. However, there can also be other lattice structures at different pressures.

Water above 4 is in line with thermal expansion and cold contraction. When the water is lower than 4, it shrinks and expands, resulting in a decrease in density, and when it is greater than 4, it resumes thermal expansion and cold contraction. Ice is the solid form of water in nature, and when the temperature is above zero degrees Celsius at atmospheric pressure, the ice will begin to melt and become liquid water.

The volume of ice on the global land surface totals 26,660,000 cubic kilometres, which is equivalent to 24,000,000 cubic kilometres of water. The vast majority of this ice is concentrated in the Antarctic zone – 23,820,000 cubic kilometres.

1. Take the melting ice to a room with a temperature of 0 degrees Celsius, and the ice cannot continue to melt;

2. At standard atmospheric pressure, the melting point of ice is 0, and the freezing point of water is also 0, so if you take the melting ice to a room with a temperature of 0 degrees Celsius, the ice cannot continue to melt;

3. Ice is a crystallization formed by the orderly arrangement of water molecules, and the water molecules are connected together by hydrogen bonds to form a very "loose" (low-density) rigid structure.

Ice turns into water because it absorbs enough heat to cause the thermal motion of the molecules to increase, which eventually causes the solid ice to turn into liquid water. When ice absorbs enough heat, its molecules begin to vibrate until the force of attraction between the molecules weakens, allowing them to flow freely and form liquids. This grinding process is called melting.

In this process, the heat is absorbed by the blind oak because the molecules need energy to overcome the attraction between them. That's why we need to add heat to the ice to make it melt.