What are the necessary conditions for combustion, what are the necessary conditions for combustion?

Necessary and sufficient conditions for the formation of combustion.

Yes:1Necessary conditions for combustion.

The occurrence of combustion is conditional, and combustibles, combustibles, and ignition sources are the three elements of combustion, and the combination of the three is a necessary condition for the occurrence of combustion. Combustion can only occur when the three conditions of combustibles, combustibles, and ignition sources are met at the same time, and combustion cannot occur regardless of which condition is missing.

2.Sufficient conditions for combustion. In some cases, the three necessary conditions for combustion are met, but combustion cannot occur due to the small amount of combustibles, the lack of oxygen, and the small energy of the ignition source.

Therefore, the sufficient conditions for combustion to occur are a certain concentration of combustibles, a certain oxygen content, and a certain ignition energy. The above three conditions have to interact with each other for combustion to occur and continue. Combustion occurs when the amount of any one of the three conditions does not reach the objective requirement.

For example, when gasoline is burned, the concentration of the mixed gas is, the oxygen content of the air is 14%, and the ignition energy is.

Based on the necessary and sufficient conditions for combustion, six factors affect the formation and continuation of combustion. Ready-to-use combustibles, external heating (ignition source), oxygen (accelerant), appropriate proportion, mixing, and reaction release enough heat to maintain combustion.

The necessary condition for combustion is the ignition source air, which can only be combusted, as long as these three conditions are met.

1.Combustibles, 2Oxygen (accelerant), 3Ignition source (temperature).

The necessary conditions for combustion are as follows:

1. The substance itself is combustible, such as solids, liquids and gases that react violently with oxygen or other oxidants in the air.

2. There are combustibles, and all substances that can help and support combustion are called combustibles, such as oxygen and oxidants.

3. There is an ignition source, and all energy sources that can cause the combustion of combustible substances are called ignition sources, such as open flames, friction, impact, electric sparks, etc.

Type of combustion.

1. There are four types of combustion, namely: flash ignition, ignition, spontaneous combustion, and **.

2. Combustion is an exothermic and luminescent chemical reaction, and its reaction process is extremely complex, the chain reaction of free radicals is the essence of the combustion reaction, and light and heat are the physical phenomena that occur during combustion.

3. In the combustion process, the momentum, heat and mass are transferred between the fuel, oxygen and combustion products, forming a complex structure of flame, which has a multi-component concentration gradient and non-isothermal two-phase flow.

Combustibles refer to substances that can be burned with oxygen or other oxidants in the air, such as wood, natural gas, oil, etc. Combustibles refer to substances that can react with combustible substances, generally referring to oxygen and oxidants, mainly referring to oxygen in the air.

Ignition source, also known as ignition source, refers to a thermal energy source with a certain amount of energy that can cause the combustion of combustibles. There are mainly open flames, electric sparks, friction sparks, etc.

1.There should be an appropriate excess of air (oxygen) during combustion

2.Have fuel.

3. To reach the ignition point.

Reach the ignition point, have combustibles, have combustibles.

The temperature reaches the ignition point and there are combustibles such as oxygen.

Combustibles, ignition point reached, oxygen (not necessarily oxygen).

Necessary conditions for combustion For any substance to combust, three conditions must be met: combustibles, oxidizers, and temperature (ignition source). The above can only represent flameless combustion, and most of the combustion we usually refer to refers to.

First it has to be combustible, then there is enough oxygen and the ignition point.

There is a combustible material that reaches the ignition point (ignition point, the minimum temperature required for combustion).

The three necessary conditions for combustion are the presence of combustibles, combustibles, and ignition sources (also known as temperature reaching the ignition point).

Combustibles undergo a rapid exothermic and luminescent oxidation reaction with oxygen or air and appear in the form of a flame. Coal, oil, natural air or gas are the main thermal energy power of various sectors of the national economy. The surge in energy demand and the rapid development of aerospace technology in modern times have promoted the combination of fluid mechanics, chemical reaction kinetics, heat and mass transfer, and made a leap forward in the development of combustion science. On the other hand, the development of fire prevention technology for the purpose of extinguishing combustion has also promoted the research of combustion theory.

Common fire extinguishing methods are as follows.

1. Covering: the method of extinguishing the fire by isolating the contact surface between combustibles and air through tools such as fire sand, water-soaked quilts, etc.;

2. Isolation: For the fire that can no longer be controlled, the combustibles near the isolation can be used to control the fire; Commonly found in forest fires;

3. Cooling: The common method is to extinguish the fire with water, and the fire brigade often uses high-pressure water guns to spray the flame to control the fire fight; Fire extinguishers such as foam fire extinguishers can also be used to extinguish the fire.

There are three conditions required for the combustion of a substance: the substance is combustible; The substance reaches the ignition point; Contact with oxygen is required for combustion.

Burning is an exothermic reaction between combustibles and oxidants, usually accompanied by flames, luminescence and/or flue gases.

Types of fire extinguishers.

Bubble-based fire extinguisher: a foam covering layer formed on the surface of the combustible object, which isolates the surface of the combustible object from the air and plays the role of suffocating and extinguishing the fire.

Dry powder fire extinguisher: When dry powder encounters high temperature decomposition, it absorbs a large amount of heat and releases vapor and carbon dioxide to cool and dilute the oxygen in the air in the combustion zone.

Carbon dioxide fire extinguisher: When the content of carbon dioxide in the air in the combustion area reaches 30%-50%, it can extinguish the combustion, mainly playing the role of suffocation, and at the same time, carbon dioxide absorbs a certain amount of heat energy in the process of spraying fire extinguishing, and it also has a certain cooling effect.

With the continuous development of social economy, as well as the continuous progress of science and technology, our lives have been improved to a certain extent, of course, our education level is getting higher and higher, people's learning opportunities are getting higher and higher, in the process of our learning, we will encounter a variety of problems, then we will think and solve. So for junior high school physics, many people are familiar with it, so what are the necessary conditions for combustion? The necessary conditions for main combustion include three aspects.

These include combustibles and temperatures that must reach the ignition point, oxygen that is in full contact with combustibles, and so on.

Combustibles include many aspects, and we often encounter them in our daily life, including gases, liquids or wood that are common in our daily life, as well as alcohol, gas, etc., which are combustibles, so there are many types of combustibles. And if you want to burn, the temperature must be large, we all know that different substances, one of its ignition points are different, so we should treat them differently, in addition, we also need to know that oxygen and combustibles are in full contact, so in this way, it can be fully combusted.

In addition, we must pay attention to the source of fire, there are many ways, types, including open flame has been friction, impact, electric sparks, etc. are fire sources, so when the above three conditions are met, the substance can be burned, so we must know. In addition, in the process of learning, we must be good at summarizing, in order to be able to memorize these things well, the most important thing to learn physics is to rely on imagination, and comprehension, and also rely on a certain memory ability to be able to learn it well, so we must pay attention to this. <

The necessary conditions for combustion are combustibles and air, and if one of these two things is missing, neither of them will burn.

It is necessary to have a certain amount of combustibles, a sufficient number of oxidants, a certain number of ignition sources, and so on.

There must be enough oxidizer, an ignition source, and a combustible, so that things can burn.

The necessary condition for combustion is that there are combustibles, and the ignition point has reached a certain level, and there are conditions for combustion.

Combustibles, oxidizers, and ignition sources, known as the combustion triad, occur when these three elements are present and interact with each other. The sufficient conditions for combustion refer to the process of interaction in which the necessary conditions for combustion to occur reach a certain amount of requirements. For flamed combustion, an unsuppressed chain reaction is also included.

The necessary conditions for combustion are:

1. Combustible substances: There must be combustible substances for combustion, that is, substances that can participate in the oxidation reaction. Generally, substances containing hydrocarbons are flammable, such as wood, coal, oil, etc.

2. Oxygen (or oxidizer): Combustion requires the participation of oxygen or other oxidants. Oxygen is the most common oxidizing agent, which can react with combustible substances and release a large amount of heat and light energy back to dates.

3. Ignition source: Combustion requires an ignition source to initiate the initial reaction. The ignition source can be sparks, high temperatures, friction, flames, etc. When the ignition source comes into contact with a combustible substance, it initiates an initial reaction, which in turn initiates the entire combustion process.

4. Activation energy: The combustion reaction needs to overcome a certain energy barrier, called activation energy, before it can occur. Activation energy means that before the reaction begins, the molecules must gain enough energy to enable them to enter an activation state with a higher energy than the starting material.

5. Continuous oxygen supply: Once the orange imitation is ignited, there needs to be enough oxygen for combustion** to maintain the continuous reaction. If the oxygen supply is insufficient, combustion may stop or produce incomplete combustion, releasing harmful substances.

Combustion refers to the process in which a substance reacts chemically with oxygen leakage (or other oxidizing agents) to release a large amount of heat and light energy.

In general, the necessary conditions for combustion include combustible substances, oxygen, ignition sources, and activation energy. Together, these conditions allow the substance to oxidize with oxygen, releasing a large amount of energy and light energy to form a flame or fire momentum, thus achieving the combustion process. Combustion is a common phenomenon in nature and human life, and it is also one of the important ways for human beings to use fire energy for energy conversion.