Analysis of the reaction of hydrogen and oxygenation to synthesize water from the perspective of mol

Under ignition or other appropriate conditions, the hydrogen molecule (H2) is forced to decompose into hydrogen atoms (H), and the oxygen molecule (O2) is forced to decompose into oxygen atoms (O), and these atoms collide with each other, and when two hydrogen atoms and one oxygen atom collide together, they combine to form a water molecule (H2O), and when many hydrogen and oxygen atoms form a large number of water molecules through effective collision, we can see the reaction phenomenon of hydrogen and oxygen to form water. At this time, the hydrogen molecule and the oxygen molecule change and become water molecules.

Books such as "Principles of Chemical Reactions" can be checked.

In chemical changes, atoms cannot be divided into atoms, whereas molecules can be divided into atoms.

Hydrogen and oxygen exist in molecular form and can be further divided into hydrogen atoms and oxygen atoms, while two hydrogen atoms and one oxygen atom combine to form a water molecule.

This change shows that molecules can be divided into atoms, and atoms can no longer be divided.

Physical change: is a change in which no new matter is formed. For example, solid ice is heated and melted into water, and liquid water evaporates into water vapor; Water vapor condenses into water, and water solidifies into ice.

In the three states of water, only the shape and state of the water have changed. No new matter is produced, so it is a physical change.

Chemical changes: ubiquitous in production and life. Such as the rust of iron, the fireworks of festivals, the neutralization of acid and alkali, and so on.

On a macroscopic scale, it can be seen that various chemical changes produce new substances, which is characteristic of chemical changes. The essence of chemical change can be understood from a microscopic perspective: the type and number of atoms before and after the chemical reaction do not change, but only the way the atoms bond with each other changes.

Chemical changes are often accompanied by light, heat, gas, precipitation or color and odor changes, and these phenomena can be referred to to determine whether chemical reactions occur. But be aware of the difference with physical change. Physical changes are also often accompanied by luminescence (electric lights), heat release (friction), gas release (opening the cap of soda bottles), color changes (oxygen becomes liquid oxygen) and other phenomena, but no new substances are generated, which is the fundamental difference between physical changes and chemical changes.

Water reacts under hot conditions to form new substances, hydrogen and oxygen--- which are chemical changes, and you need to carefully figure out the definitions of these two changes.

Summary. Water is continuously heated above 1000°C to decompose into hydrogen and oxygen.

If you have any questions, please feel free to consult me.

At what high temperature can water be broken down into hydrogen and oxygen.

Hello, according to your problem analysis, the answer for you is as follows: water is continuously heated above 1000 °C and all decomposes into hydrogen and oxygen. If you have any questions, please feel free to consult me.

This relates to the definition of the word "matter" in the discipline of chemistry (the word "matter" has different definitions in philosophy, physics, chemistry, etc.).

In chemistry,substancemeans any organic or inorganic substance that has a specific molecular identifier, including:

1) any compound of a substance or a naturally occurring substance that is produced in whole or in part as a result of a chemical reaction;

2) Any element or non-chemical cluster of atoms.

Atoms are the smallest particles in a chemical change, and in a chemical reaction, the atoms are recombined into a new substance. Atoms bond together to form molecules. Ions are charged atoms or clusters of atoms.

The result is thisFocus

1. The group of atoms is not a "substance" concept in chemistry, and the atomic group with a unique structure (including molecules, ions, etc., and monoatomic molecules) composed of atoms is a substance in chemistry.

2. The characteristics of the atom combination structure, bonding mode, whether it is charged and charged, etc., determine the distinction between substances, as long as the above characteristics are different, they are different substances.

Substances in the chemical concept are divided into two main categories: pure substances and mixtures, and pure substances are further divided into two categories: elemental substances and compounds.

In the reaction where water is split into hydrogen and oxygen:

2h₂o = 2h₂↑ o₂↑

The water molecule contains hydrogen and oxygen, which form a fixed ratio and structure in the form of chemical bonds, which has a unique molecular structure and is a chemical compound.

In the hydrogen molecule, two hydrogen atoms form a fixed ratio and structure by chemical bonds, which has a unique molecular structure and is a pure substance.

In the oxygen molecule, two oxygen atoms form a fixed ratio and structure in the form of chemical bonds, which has a unique molecular structure and is a pure substance.

It can be seen that water, hydrogen, and oxygen are three different substances, which are transformed from water into hydrogen and oxygenA change in the type of substance occurs in the process, so belongsChemical changes

Water contains hydrogen and oxygen", or "water molecules contain hydrogen atoms and oxygen atoms".

In these two formulations: "water" and "water molecule" belong to the concept of "matter", and the four concepts of "hydrogen element", "oxygen element", "hydrogen atom" and "oxygen atom" do not belong to the concept of "matter" in chemistry.

The reaction of hydrogen and oxygen to produce water is both a redox reaction and a chemical reaction.

A chemical reaction is a reaction in which two or more substances react to form a new substance. Some of these reactions are redox reactions and some are non-redox reactions. In addition, chemical reactions generally release energy.

Oxidation is a chemical reaction between a substance and oxygen, in which oxygen is provided. The effect of electron loss in matter is called oxidation; On the contrary, the action of gaining electrons is called reduction. Oxidation reaction in the narrow sense refers to the combination of substances and oxidation; A reduction reaction is the action by which a substance loses oxygen.

The oxidation value increases during oxidation; The oxidation value decreases when reduced. Oxidation and reduction both refer to reactants. Oxidation is also known as oxidation reaction.

The reaction of hydrogen and oxygen to form water is a very important chemical reaction. This reaction is very common because water is one of the most prevalent substances on Earth. So, what are the conditions for hydrogen and oxygen to react to produce water?

First of all, the condition for the reaction of hydrogen and oxygen to produce water is that there needs to be enough hydrogen and oxygen. These two gases must be mixed together in a certain ratio for the reaction to occur. Typically, the ratio of hydrogen to oxygen is 2:

1。That is, two parts hydrogen and one part oxygen are required for the reaction to occur.

Secondly, the condition for the reaction of hydrogen and oxygen to produce water is that there needs to be enough energy. This reaction requires the release of a large amount of energy to take place. Once this reaction begins, it releases enough heat for water vapor to form, and it cools the water vapor into liquid water.

Finally, the conditions for the reaction of hydrogen reed gas and oxygen to produce water require a suitable environment. This reaction needs to be in the right environment for it to happen. Normally, this reaction needs to be carried out at a certain temperature and pressure.

If the temperature or pressure is insufficient, this reaction cannot take place.

In conclusion, the reaction of hydrogen and oxygen to produce water is a very important chemical reaction. This reaction requires enough hydrogen and oxygen, enough energy, and the right environment for this to happen. This reaction not only occurs in nature but also plays an important role in our lives.

When water is electrified, water molecules are decomposed into oxygen atoms and hydrogen atoms, every two oxygen atoms constitute an oxygen molecule, every two hydrogen atoms constitute a hydrogen molecule, a large number of oxygen molecules gather to become oxygen, and a large number of hydrogen molecules gather to become hydrogen.

Therefore, the answer is: the type of molecule must change in chemical change, but the type of atom does not change, and the atom is only recombined

As can be seen from the diagram, the reaction is the reaction of hydrogen and oxygen to produce water, and the literal expression is hydrogen + oxygen ignition.

Water; At the same time, it can also be concluded that the atom is the smallest particle in the chemical change, and the type of molecule changes before and after the chemical reaction, and this reaction is a multi-change reaction, which belongs to the chemical reaction.

So the answer is: hydrogen + oxygen ignition.

Water; The atom is the smallest particle in the chemical change, and the type of molecule changes before and after the chemical reaction.

Water can be broken down into hydrogen and oxygen above 2000 degrees Celsius.

The chemical equation is: 2H2O = 2H2 +O2. The condition is high temperatures.

Although water can be decomposed at this temperature, the decomposed hydrogen and oxygen will be burned immediately, so it is unrealistic to use high-temperature water splitting to obtain hydrogen and good oxygen.

Under the action of direct current, water decomposes to produce hydrogen and oxygen, which is used to produce pure hydrogen and pure oxygen in industry.

Chemical experiment: electrolysis of water.

Equation: 2h o = energized = 2h + o (decomposition reaction).Additional Information:1. Oxidation of water: When water reacts with more active metals or carbon, it shows oxidation, and hydrogen is reduced to hydrogen.

2na+2h₂o=2naoh+h₂↑

mg+2h₂o=mg（oh）₂↓h₂↑

3Fe + 4H O (water vapor) = Fe O + 4H (heating) C + H O = Co + H (high temperature).

2. Reducibility of water: When water reacts with fluorine, it shows reducibility, and oxygen is reduced to oxygen 2F + 2H O = 4HF + O.

3. Ionization of water:

Pure water has a very weak ability to conduct electricity, because water has a weak ionization, there is a dissociation equilibrium of water.

h₂o←→h⁺+oh⁻

Water has the following chemical properties:

1.Stability: Doesn't decompose until above 2000.