What kind of matter has three states, and what are the three states of matter?

Big brother, the three states are for pure material molecules or homogeneous molecular mixtures, paper is nothing, you have to say, I can only be paper paste, and water, who told you that water has no three states, ice is not the solid state of water, water vapor is not the gaseous state of water.

The three states refer to the relatively stable state of matter under certain temperature and pressure conditions, which is called the state of matter. Under general conditions, it is mainly the aggregate state of three molecules or atomic groups in solid, liquid and gaseous states. When molecules or atoms, under the influence of interaction, can only make small irregular vibrations around their respective equilibrium positions, they appear to be solid; When a molecule or atom moves violently, so that it does not have a fixed equilibrium position, but it is not dispersed away, it is in a liquid state; If not only the equilibrium position of the molecule or atom is gone, but also cannot maintain a certain distance, the interaction between the molecules or atoms can be almost negligible except when they collide with each other, and it will behave as a gaseous state.

Thus, the solid state is able to maintain a certain volume and shape, the liquid state can maintain a certain volume but does not have a certain shape and is fluid, while the gas can fill the space it can reach, neither having a certain volume nor a certain shape.

Therefore, any pure substance that does not decompose has a three-state change.

Pure substances have three states, the mixture is calculated alone, and some decompose before reaching other states, which is not counted, you have to study hard, the problem is good, and work hard.

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

The process by which a substance changes from a solid state to a liquid state is called melting. The direct process of change of matter from a solid state to a gaseous state is called sublimation. Let's take a look at each of them.

Tri-state change note:

Melting: The process by which a substance changes from a solid state to a liquid state is called melting. It is important to note that it is melting, not melting.

Coagulation: The change of a substance from a liquid state to a solid state is called coagulation. The substance absorbs heat when it melts and releases heat when it solidifies.

Solids are divided into crystalline and amorphous, with crystals having a fixed melting temperature when melting and amorphous melting not having a fixed melting temperature.

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.

Answer: There are three states of matter in nature, namely solid, liquid, and gaseous, and these three states are called the three states of matter. As the external conditions of each substance change, its own state also changes.

For example, when water is a liquid, when it is heated, its temperature rises and it can become a gaseous state, that is, water vapor; Conversely, if water is cooled, its temperature drops and it can become solid --- ice. In the thermal prime mover, gas is used to propel the parts, such as water vapor for steam turbines and gas for gas turbines. So it is important to understand the properties of gases.

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.

Summary. Hello dear, happy to answer for you! The process by which solid, liquid, and gaseous substances change from one state to another is called a change of state of matter.

Solid state is a thermodynamic equilibrium state of matter, which has a relatively fixed volume and shape and a relatively hard texture compared with liquids and gases.

Hello dear, happy to answer for you! The process by which solid, liquid, and gaseous substances change from one state to another, is called a change in the state of matter. The solid state is a thermodynamic equilibrium state of the existence of matter, and the solid has a relatively fixed volume and shape, and the texture is relatively hard compared with liquids and gases.

The hydrophilic bond macro body has a flowing xing, and it will have any shape if it is placed in a container of any shape. When the van der Waals force between the molecules of the liquid body is broken, the object changes from a liquid state to a gaseous state. When the intermolecular thermal motion of a liquid object decreases, so small that intermolecular chemical bonds can be formed, so that chemical bonds dominate between molecules, the liquid becomes solid. The gaseous state is a state of matter, a fluid that can flow, deform, diffuse, and its volume is not limited.

The three elements of the gaseous state are volume, temperature and its pressure, and the atoms or molecules of the gaseous substance are very distant from each other and can move freely between each other. The kinetic energy of atoms or molecules of gaseous substances is relatively high.