Why doesn t the sun need oxygen to burn?

That's a good question, and it's really hard to figure out before you were exposed to the physics of nuclear fusion. When I first came into contact with chemistry, the textbook gave the conditions for combustion, that is, the so-called three elements of combustion: combustibles, combustibles (such as oxygen), and reaching the ignition point.

The sun is in space, so naturally there is no combustible, and the combustibles are also suspicious. However, when the concept of nuclear fusion is learned, these doubts are easily solved.

Nuclear fusion is a physical reaction that refers to the process by which the nuclei of atoms coalesce, creating new nuclei and releasing energy at the same time. In the process of polymerizing small nuclei into large nuclei, there is a loss of mass, and according to the mass-energy equation, a huge amount of energy can be released. Therefore, unlike traditional chemical combustion, this process does not require the involvement of combustibles, because it is not essentially called "combustion" at all.

However, it is not easy to bring the nuclei together, and it takes extremely high temperatures and pressures to allow the fusion reaction to begin. But once it starts, the critical condition is broken, and the huge amount of energy released can sustain this reaction, and there is no longer any need for external energy input. This is the case with the sun, where the process of nuclear fusion is constantly taking place, constantly shining and glowing.

With the help of this principle, we can make nuclear ** and nuclear power plants. The hydrogen bomb is a nuclear ** made by fusion reaction, and controllable nuclear fusion is expected to solve the earth's energy problem, but the technical requirements are too high to be done at present. But this is the direction that various countries are working towards, that is, the "artificial sun".

The artificial sun uses hundreds of high-energy lasers to concentrate on a target ball, which instantly generates huge pressure and hundreds of millions of degrees of high temperature, causing the target to undergo a fusion reaction. It is still in the experimental stage, but it is believed that in the near future, scientists will be able to master this technology for the benefit of mankind.

Combustion, written in English, is defined in the classical theory we learned in middle school as the process by which a substance undergoes a violent redox reaction and produces light and heat. This definition requires that oxygen does not necessarily participate, but must meet the condition that it is a redox reaction. If we start from this definition alone, there is no redox reaction on the sun, and there is no such thing as combustion.

It is now said that combustion is a "chain reaction involving free radical intermediates". This looks like a fusion reaction with the nucleus of an atom that takes place on the sun, but it is not the same in substance. This is because combustion is a chemical reaction, and the free radicals of its reaction body are atoms or groups with unpaired electrons formed after the chemical bond is broken; Nuclear fusion, on the other hand, is a physical reaction in which the main body of the reaction is the nucleus of an atom.

So it comes to Conclusion 1The sun is not burning.

Then there is the question of why the sun "emits flames". I think the question is really "why does the sun shine like a flame?" What is a flame? In layman's terms, a flame is a gas that ionizes after being heated at a high temperature produced by combustion.

The reason why flames "emit light" is that during the ionization process, the atoms are excited by energy and release photons, which also produces visible light.

Why do we see the sun shining? To answer this question, let's first understand the structure of the sun. Just as the Earth is divided into core-mantle-crust from the inside out, the Sun is not a rocky planet like the Earth, but scientists have divided the Sun into a similar layer, which is from the inside out:

Solar core - radiating sphere - troposphere - photosphere - atmosphere. Scientifically, the surface of the photosphere is used as the "surface" of the sun, and beyond is the atmosphere of the sun, which in turn contains the chromosphere, the corona, etc. The glowing sun we see is actually the sun's photosphere.

The sun is not called burning, it is called **, and it is the most powerful nuclear fusion**, (don't ask me what nuclear fusion is, check it yourself).

<> there is no oxygen on the sun, but why is it able to burn? In fact, it is not correct to say that the sun burns, because the normal combustion reaction will have three major elements: the ignition source, oxygen, and combustibles, and will also produce the residue of burning materials.

The phenomenon is not a combustion phenomenon, but a nuclear fusion and destruction of the forest transformation reaction.

So, what is called a nuclear fusion reaction? The sun's nuclear fusion reaction is to take four hydrogen atoms.

The process of fusion into a helium atom, 4 million nuclear matter is fused in the sun every second, and in the process the sun constantly releases energy, Einstein.

The intelligent equation.

To be able to explain it effectively, the energy produced by nuclear fusion is an ordinary chemical reaction.

20 million times the energy released, in other words, the energy released by the fusion of one kilogram of hydrogen nuclei into helium atoms is equivalent to the energy released by burning 4,000 tons of oil, or 6,000 tons of coal, which shows how much energy the sun brings to us, it is the light and heat generated by this physical reaction, not the combustion required by ordinary chemical reactions, it is worth mentioning that the sun has been nuclear fusion for 5 billion years, and the energy he brings us is enough to support the reproduction of all living organisms.

According to scientists' calculations, the central temperature of the sun is as high as 15 million degrees Celsius.

It is a collection of high temperature, high pressure, high density as one of the region, the energy released by the solar nuclear fusion reaches the surface of the sun when the temperature will be reduced to 6000 degrees Celsius, but this temperature is enough to melt all foreign objects, so, with the current detection of human beings can only reach the part outside the sun, but it is certain that the sun's light and heat are consumed at a rate of millions of tons per second, so his energy is not endless, according to scientists' estimates, Nearly half of the sun's energy spine has been consumed in these 5 billion years, and the other half can be maintained for about 5 billion years, when the nuclear reaction inside the sun expands from the inside out, the temperature of the sun's surface rises, the volume expands, and finally comes to an end.

There is no oxygen on the sun, because the sun produces a lot of heat, and it will burn with other things, so it can burn.

There is oxygen on the sun. This is because the sun has a certain amount of solar energy, and the sun also undergoes thermonuclear fusion reactions, so it burns.

Of course there is no oxygen. Because the inside of the sun there will be nuclear fission, nuclear fusion, there will be hydrogen atoms, so it will burn.

In our common sense, it seems that there must be oxygen for combustion, but there is no oxygen on the sun, but it still burns for billions of years. Then the following is byKnowledge of horoscopes

How can the sun burn without oxygen?

First of all, we must clarify two facts, first, oxygen is not a necessary condition for combustion, that is, Feng Chuan said, combustion can be achieved in the presence of oxygen, but if there is no oxygen, it can still be burned, for example, as we all know, magnesium strips are burned in the absence of oxygen, and hydrogen can also be burned in nitrogen, these chemical reactions can be combusted, but oxygen is not needed. Therefore, it can burn even in the absence of oxygen.

Second, although the sun can shine and heat, it is very similar to the combustion in our lives, but in fact, the sun is not burning, specifically, the special geographical environment of the sun, the silver field model, so that hydrogen is in the process of continuous nuclear fusion, producing helium at the same time, releasing a large amount of energy, and these abilities will be released in the form of light and heat. Although combustion is also the release of heat and light, there is a fundamental difference between the two. So, we can explain the above problem.

First of all, because combustion is not necessarily related to whether or not it is in an oxygen environment, the sun's luminescence and heat have nothing to do with oxygen. Therefore, the sun will not affect the sun's luminescence and heat in an oxygen-free environment, so even in the oxygen-free environment of the sky, the sun still shines normally, providing the light and energy we need to survive. Secondly, the reason for the energy released by the sun is nuclear fusion, and more figuratively, the hydrogen bomb was invented with such a theory.

Therefore, the principle of the sun is similar to that of the hydrogen bomb, which exhibits similar properties to combustion through physical changes. At the same time, a large amount of energy is released. Because of the sun's environment, the amount of hydrogen is unlimited, so even though the sun has existed for billions of years, it still maintains the same nuclear fusion process to provide the environment needed for the earth's body.

So without oxygen, the earth can still shine for billions of years, but this is not combustion, and it has nothing to do with oxygen.

Introduction: The Sun is the only star in the solar system, and the Sun is the only object in the solar system that can emit light and heat, and it needs oxygen in people's daily life, especially in the burning phenomenon of the earth. But why does the sun continue to burn without oxygen?

There are many ways to generate heat energy, and for the sun it continues to glow, and heat is not caused by combustion, but by nuclear fusion, which is mainly the fusion of hydrogen. Hydrogen can produce a large amount of energy in the process of fusion, and hydrogen will further become helium, and helium will further fusion. Moreover, the hydrogen content in the sun is very high, so the occurrence of this fusion in one post, the sun itself is a huge reactor itself through continuous light and heat, and countless reactions are carried out in this reactor.

Therefore, the sun can shine for a long time and can provide corresponding temperatures for other planets. The oxygen required for combustion is mainly the oxidation reaction that people are exposed to in their daily lives. Therefore, there are some phenomena in daily life that seem to be similar, but the essence is completely different, and they cannot be generalized and should be discussed separately.

In such a situation, the source can effectively discover the law.

Solar energy is indeed a good renewable energy, through which people can be converted into electricity in time, but solar energy resources are different in different regions. Therefore, we need to find other renewable energy sources, so that we can promote the continuous progress of human society. With energy comes motivation, so that the cost of living in people's daily lives can be reduced.

In addition, the use of non-renewable energy should be controlled accordingly, and everyone should practice a low-carbon lifestyle. Low-carbon living can reduce greenhouse gas emissions, make one's own environment healthier, and change people's habits of hail and hunger.

The sun is a nuclear reaction, not an ordinary combustion, it does not need oxygen, and it can still carry out nuclear reactions.

Because the combustion of the sun is mainly due to nuclear fusion, it can continue to burn even if there is no yang energy at this time.

Because the sun doesn't need oxygen to burn, the sun itself is a very hot thing.

Because the sun can spontaneously combust, the sun generates heat through the conversion of its own energy, and the heat produced is used by people on earth.

Because it is not burned by the contact between the combustible material and the air to reach a certain temperature, but only produces a violent high temperature when the reaction occurs.

That's because the burning of the sun is carried out by a special substance, which are two different cases.