Does the distance between the molecules of ice melt into water become larger or smaller why

Ice is a solid formed by hydrogen bonding.

Hydrogen bonding creates an empty space in the ice structure (the structure of the ice wastes a lot of space). When the ice melts and the structure dissociates, the molecules fill the wasted space.

This means that when the ice melts, its volume will shrink. Ice is different from most solids in this respect, and most solids will increase in volume when they melt.

Correspondingly, when the water freezes, the water molecules.

The hydrogen bonds will form an empty molecular structure, resulting in an increase in its volume. Whereas, most liquids shrink in volume as they solidify.

In extremely cold liquid water, there is still an empty structure formed by hydrogen bonds. As the temperature increases, the molecules continue to break away from the empty structure, and the volume occupied by the water decreases (the density increases). When the molecule is completely separated from the empty structure, as the temperature continues to increase, the effect of the thermal motion of the molecule to increase the molecular spacing will be revealed, which is the normal performance of liquid heating.

At 0 to 4, the volume of water will decrease as the temperature rises. 4 to.

It should have gotten bigger. The volume of ice and water ice of the same mass is relatively small, and the main influence of the volume is the distance between molecules, so the distance between water molecules is greater than the distance between water molecules in ice.

Get bigger. The arrangement of water molecules is relatively "loose".

Water freezes in volume because the spacing between water molecules increases:

1) The water molecules in liquid water are arranged irregularly, and after solidification, the arrangement becomes regular, and due to the action of hydrogen bonding, a tetrahedral structure is formed between the water molecules, which makes the void between the water molecules larger, so the volume of water increases after it becomes ice;

2) Since the water molecule width is a highly polar interosmotic molecule, it can be combined into an association molecule (a combination of multiple water molecules) through hydrogen bonding.

3) Ice has a tetrahedral crystal structure.

As the structural form of the molecule changes, the interval becomes larger.

The intermolecular distance of solids and liquids is generally unchanged, and the molecular spacing becomes larger when the temperature rises under constant pressure, and the density or mass of the gas becomes smaller when the gas is constant volume, and the molecular spacing becomes more sensitized.

That is, when the number of molecules per unit volume decreases, the molecular spacing increases. Microscopically the molecules are constantly moving, but the amplitude of the oscillation of the solid and liquid molecules is small, and the molecules in the gas are in irregular motion.

In the process of changing from ice to water, the molecular interval decreases, and when the water temperature is greater than 4 degrees Celsius, the molecular interval increases, and the molecular interval gradually decreases when the temperature is greater than 4 degrees Celsius.

Once it is less than 4 degrees Celsius, it will increase again, and then turn into ice and then decrease or simply say that water becomes ice, the volume increases, and the molecular interval increases; Ice turns into water, the volume decreases, and the molecular spacing decreases This is because water expands abnormally.

After the ice melts into water, the solid becomes liquid, and the intermolecular distance continues to decrease, reaching a minimum at 4. When the temperature increases, the intermolecular distance gradually increases due to the increase of temperature.

The reason why ice is actually less dense than water is that the maximum density of water is 4, and the density decreases below or above 4.

Since water molecules are highly polar molecules, they can be combined into associative molecules (groups of water molecules combined) by hydrogen bonding. Liquid water, in addition to simple water molecules (H2O), also contains association molecules, the most typical two are (H2O)2 and (H2O)3, the former is called bimolecular association water molecule. The density of a substance is determined by the average spacing of molecules within a substance.

When the temperature is 0 when the water is not frozen, most of the water molecules exist as (H2O)3 association molecules, and when the temperature rises, the water molecules mostly exist in the form of bimolecular association water molecules (in the process of water temperature rising from 0 to 4, the effect of increasing water density caused by the breaking of hydrogen bonds of associated water molecules is greater than the decrease of water density caused by the acceleration of molecular thermal movement, so in this process, the density of water increases with the increase of temperature. ), the molecules occupy a relatively small space, and the density of water is at its highest. If the temperature continues to rise above this, the law of thermal expansion and cold contraction of general matter will prevail.

When the water temperature drops to 0, the water freezes, and when the water freezes, almost all the molecules are associated together to become a huge association molecule, and the arrangement of water molecules in the ice is that each oxygen atom has four hydrogen atoms as close neighbors (two covalent bonds, two hydrogen bonds), so this arrangement leads to an open structure, that is to say, there are large voids in the structure of the ice, so the density of the ice is inversely smaller than that of water at the same temperature.

Water freezes through exothermic and becomes smaller in size, so the molecular gap becomes smaller.

Why does water get bigger when it freezes? It's not easy for people to know.

Summary. Internal energy is equal to kinetic energy plus potential energy. If the temperature does not change, the energy does not change, and the distance between the molecules becomes smaller, and the molecular potential energy becomes larger.

When ice melts into water at 0 degrees, the volume decreases due to the constant temperature, why does the intermolecular distance decrease and the internal energy increases?

Internal energy is equal to kinetic energy plus potential energy. If the temperature does not change, the energy does not change, and the distance between the molecules becomes smaller, and the molecular potential energy becomes larger.

Therefore, the kinetic energy does not change, and the potential energy becomes larger, resulting in an increase in internal energy.

Why does the molecular spacing become smaller and the internal energy becomes larger.

If the temperature is the same, their average molecular kinetic energy is the same; And because ice turns into water, the number of molecules is the same, and the total kinetic energy of their molecules is the same because of the brother, and the magnitude of the internal energy is determined by the temperature and volume of the object. Ice turns into water, the volume becomes smaller, the molecular spacing becomes smaller, and the principle of thermal expansion and cold contraction increases.

Summary. Yes, dear, the density of water after freezing is indeed lower. Ice is more spaced between molecules than in water. This is due to the special structure of the water molecule and the formation of hydrogen bonds.

The density of water becomes smaller when it freezes, and the spacing between molecules in ice is larger than that of water, right, and why.

Yes, dear, the density of the water knot cave after the ice is indeed low. Ice is more spaced between molecules than in water. This is due to the Turner structure of water molecules and the formation of hydrogen bonds.

In liquid water, the water molecules are relatively closely arranged, and the bridge or shed molecules are close to each other. When the water is cooled to near freezing, the molecular movement slows down and the water molecules gradually form a regular crystal structure, i.e., ice. In ice, water molecules are arranged in hexagonal lattices, which form a stable structure.

In ice, hydrogen bond formation between water molecules is more stable than in liquid water. Hydrogen bonding is a weak interaction force between water molecules, which will cause the distance between the molecules to increase appropriately. As a result, the distance between the water molecules in the ice is relatively large, resulting in a lower density or degree of ice than that of liquid water.

This special property allows ice to float on the surface of liquid water, maintaining a relatively stable temperature at the bottom of the water body, and playing an important role in protecting underwater life.

What is the relationship between the molecular spacing between crystals and liquids, solids, and gases?

The magnitude relationship between the molecular spacing between crystals, solids, and liquids can be described as:1Crystals:

Crystals are made up of ions, atoms, or molecules arranged periodically. Its molecular spacing is very small and ordered, and the molecules are tightly packed together in a regular manner. 2.

Solids: Solids have smaller molecular spacing than crystals. Solid molecules or atoms have a certain arrangement structure in space, but they do not have the complete periodicity of a crystal as a rent.

3.Liquids: Liquids have a larger molecular interval than solids.

The molecules or atoms of a liquid do not have a fixed arrangement structure, they can move and flow freely, but the interaction between molecules is still relatively tight. 4.Gas:

The molecular spacing of gases is maximum. There is little interaction between the molecules or atoms of the gas, they move at high speed and have large intervals that can be freely diffused within the container. Thus, the molecular spacing of crystals is minimal and ordered, that of solids is slightly larger, that of liquids is larger, and that of gases is maximum.

When the quality of the ice body is destroyed, the ice body accompanies the volume: water volume = 10:9 volume reduction = (10-9) 10 100% = 10% A moment forever 523 will answer for you, I wish you learning and progress If you approve of me, please click the [for satisfaction] button in time The mobile phone questioner can comment on the old price on the client "satisfied" Your.

The molecular potential energy does not bend monotonically with the change of the distance between the molecules, and there is a minimum point of molecular potential energy. This substance is most stable here. Away from this point, no matter whether the distance increases or decreases, the potential energy will leak and increase.

Molecular potential energy is the result of the combined action of gravitational and repulsive forces between molecules. Repulsion is a short-range force that works only at a certain distance. When water turns into ice, the volume increases, the molecular spacing increases, the repulsion force does not exist, the gravitational force decreases, so the potential energy decreases.

When the ice melts into water, the volume decreases, the molecular spacing decreases, the gravitational force increases, and the repulsion force also acts, so the potential energy increases.

The volume of objects, the state of matter affects their potential energy by influencing the spacing of molecules and the force acting on them, 3, this problem should be considered in another direction. In the process of ice melting into water, the temperature does not change, so the kinetic energy of the molecule remains unchanged, and because the ice needs to absorb heat in the process of melting into water, the internal energy increases, and because the internal energy includes kinetic energy and potential energy, the kinetic energy does not increase, but the potential energy increases. ,0,How does the molecular potential energy of ice increase during the melting of water into water?

Is it the decrease in molecular spacing that leads to an increase in molecular potential energy? So the molecular spacing of ice is just around the equilibrium point of gravity and repulsion?