What are the changes between the three states of matter?

It's a physical change.

Physical change refers to the fact that although the state of matter has changed, generally speaking, the composition of the substance itself has not changed. For example, changes in position, volume, shape, temperature, pressure, and conversion between gaseous, liquid, and solid states.

There is also the interaction of matter with electromagnetic fields, the interaction of light with matter, and microscopic particles (electrons, nuclei, elementary particles.

etc.), all of which are physical changes.

The basic three-state change of matter, and no new substance is produced, so it belongs to physical change. NAOH and other inorganic salts.

The deliquescent of alkali, the melting of ice, the crushing of bile alum.

Wait. For example, molten iron is cast into an iron pot, which involves the element carbon.

The combination of new molecules with iron (generally iron carbide) is not counted as a physical change, but if it is 100% pure iron, it will not undergo chemical changes and no new substances will be formed when cast into an iron pot.

It's a chemical change, because it becomes a different element. But there are also some allotropes.

The transformation is a physical change, such as monoclinic sulfur and orthorhombic sulfur, because these allotropes are all directly made of sulfur atoms, but in different states. Before and after the physical change, the type, composition, and chemical properties of the substance remain the same. The essence of this type of change is a change in the state of aggregation of molecules (separation distance, speed of motion, etc.), resulting in a change in the shape or state of the substance.

Physical changes express the physical properties of the substance. Physical change is fundamentally different from chemical change.

I hope I can help you with your doubts.

The three states of matter refer to gaseous, liquid, and solid, and the changes between these three arePhysical changes。Because in this process of change, only the state of matter changes, and no other matter changes.

The three-state change of matter refers to the process of transforming a substance from one state to another at different temperatures and pressures, including solid, liquid-limb state, and gaseous state.

1.Solid: At lower temperatures and higher pressures, matter will exist as a solid state.

In the solid state, the molecules are more attractive to each other, and the molecules will be arranged in an orderly manner to form a lattice structure. The shape and volume of the substance will remain fixed and will not flow under normal conditions.

2.Liquid: When the temperature increases or the pressure decreases, the substance transforms from a solid state to a liquid state.

In the liquid state, the mutual attraction between the molecules of a substance is weak, and the molecules are able to move freely within a certain range but still maintain a denser arrangement. The shape of the substance adapts to the shape of the container, but the volume remains essentially the same.

3.Gaseous: When the temperature increases further or the pressure decreases further, the substance transforms from a liquid state to a gaseous state.

In the gaseous state, the interaction forces between the molecules are very weak, and the molecules are able to move at high speed and have large intervals. The shape and volume of the substance adapts perfectly to the container in which it is placed.

In addition, there are two other state variations:

4.Plasma state: Under high temperature and high energy conditions, the material and hail can be converted into a plasma state. In the plasma state, the atoms or molecules of a substance lose or gain electrons, forming positive and negative ions with the presence of free electrons.

5.Condensed matter: Under conditions of extremely low temperature or very high density, substances can appear in condensed matter, such as gelatinous state, aerosol state, etc.

These changes in states are due to changes in temperature and pressure that lead to changes in the interaction forces between molecules, which changes the structure and properties of matter. These changes have an important impact on many sail rental phenomena and processes in our lives, such as solidification, dissolution, evaporation, vaporization, etc.

The process of transformation between the solid-liquid-gas states is called phase transition or phase transition.

These transformations are due to the molecular motion of matter being altered at different temperatures and pressures.

Solid-liquid phase transition: when a substance changes from a solid to a liquid, it is called melting; When a substance changes from a liquid to a solid, it is called solidification.

Liquid-gas phase change: When a substance changes from liquid to gas, it is called evaporation or vaporization; When a substance changes from a gas to a liquid, it is called condensation.

Solid-gas phase transition: when a substance is directly transformed from a solid to a gas, it is called sublimation; When a substance is directly transformed from a gas to a solid, it is called condensation.

These phase transformation processes occur at a certain Li excitation temperature and pressure and are related to the thermodynamic properties of the substance.

Chemistry.

1.About the change of the three states of matter.

Sublimation is the direct conversion of solids into gases, such as freezing clothes in winter that dry without melting.

It can occur under normal conditions, as long as the substance has three states: solid, liquid and gas. Melting is the process by which a solid rises to the melting point of a substance and changes to a liquid phase, which must be reached for this to occur.

A phenomenon in which a liquid reaches the boiling point of a substance and becomes a gas when it boils, and it must be heated to a certain temperature. For example, the boiling point of water at atmospheric pressure is 100 degrees Celsius, and when it is heated to 100 degrees Celsius, it will boil, and the temperature will not rise again.

If you want to increase the temperature, you need to increase the pressure because the boiling point is related to the pressure. Evaporation is a phenomenon in which a liquid is transformed into a gas.

It can usually occur. For example, water will evaporate at 0, 20, 80, etc., and it is a state that occurs at any time.

Unless the water vapor pressure in the environment in which the water is located reaches its saturated vapor pressure, evaporation will not occur in a macroscopic sense. There are similarities between these processes, and you will understand it if you think about it.

2.The three states of matter change with each other.

Liquefaction: From a gaseous state to a liquid state (exothermic).

Coagulation: Changing from a liquid state to a solid state (exothermic).

Condensation: From gaseous state to solid state (exothermic).

Vaporization: from a liquid state to a gaseous state (endothermy).

Melting: Changing from a solid state to a liquid state (endothermy).

Sublimation: From a solid state to a gaseous state (endothermy).

And - in the same substance, the distance between molecules in the solid is small.

The distance between molecules in a liquid is smaller.

The distance between the molecules in the gas is large.

Thus: the heat of a solid in the same substance should be smaller, the heat in a liquid should be slightly larger, and the heat in a gas should be the largest, right?

Hence the term endothermic and exothermic? The teacher didn't elaborate on this, I just wanted to know if there was a correlation ...... between themI'm just guessing, I'm not sure. Perhaps, just a coincidence?

Solid, liquid, gas.

Solids, liquids, high first beats, melting, endothermy.

Liquid gases vaporize and absorb heat.

Solid gas sublimation is endothermic.

Liquids, solids, solidification, exothermics.

Gases, liquids, condensation, or liquefaction, exothermia.

Gas: Qi Xiang, solid, condensate, acorn, exothermic.

1. The solid state melts into a liquid state;

2. Liquid vaporization becomes gaseous;

Dan Minghu 3, solid sublimation into gaseous state;

4. Gaseous liquefaction becomes liquid;

5. The liquid solidifies and collapses into a solid state;

6. Gaseous condensation becomes solid.

Solid, liquid, gaseous.

Vaporization: liquid to gaseous, endothermic.

Liquefaction: gaseous to liquid, exothermic.

Melting: Solid becomes liquid, endothermic.

Coagulation: liquid state becomes solid, exothermic.

Sublimation: The solid state becomes gaseous, endothermic.

Condensation: gaseous state becomes solid, exothermic.

What changes is only the form of the substance, and the chemical structure of the substance does not change.