Is it an oxidation reaction without oxygen but with oxides?

h2 + cuo = h2o + cu

H2 binds to O in Cuo, and H2 undergoes an oxidation reaction.

However, there is no oxygen O2 involved in the whole reaction.

The chemical reaction between a substance and oxygen is called an oxidation reaction; Oxygen can react chemically with many substances. The function of gaining electrons is called reduction. Oxidation in the narrow sense refers to the combination of substances and oxidation; Reduction refers to the action of a substance losing oxygen.

The oxidation value increases during oxidation; The oxidation value decreases when reduced. Oxidation, reduction both refer to reactants (molecules, ions, or atoms). Oxidation is also known as oxidation or oxidation reaction.

When organic matter reacts, the effect of introducing organic matter into oxygen or removing hydrogen is called oxidation; The action of introducing hydrogen or losing oxygen is called reduction.

And please note that the oxidation reaction is the reaction between the substance and the oxygen, and the oxygen here refers to the oxygen element and does not refer to the elemental element of oxygen, so the reaction between the substance and the oxygen must be the oxidation reaction, but the oxidation reaction does not necessarily involve oxygen;

If you have any questions, please ask.

Not necessarily, the oxidation reaction does not necessarily have oxygen involved, as long as the valency of the elements in the reaction increases, then it can be called an oxidation reaction. For example, most metal oxides undergo metathesis reaction with acid, although oxides participate in the reaction, the valence of each element before and after the reaction remains unchanged, so it is not an oxidation reaction.

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CuO+H2 heats Cu+H2O

Cuo is an oxidizing agent and H2 is a reducing agent.

It is a redox reaction.

Oxidation reactions are generally accompanied by reduction reactions, so they are called redox reactions. Just remember the mantra "the increase in valency is oxidized, and the decrease in valency is reduced", so the increase and decrease of valency is its sign, the oxidized is the reducing agent, and the reduced is the oxidant.

4Fe + 3O2 = 2Fe2O3, this reaction is a typical redox reaction, Fe is oxidized from 0 valence to +3 valence, O is reduced from 0 valence to -2 valence, you can compare the formula. Similarly, for example: H2+Cl2=2HCl, H is oxidized from 0 valence to +1 valence, and O is reduced from 0 valence to -1 valence, which is the same, so the redox reaction mainly looks at the increase and decrease of valence.

As long as the valency of the element increases, it is an oxidation reaction.

As long as there is a reaction with increased valency, it is an oxidation reaction.

Oxidation reactions do not necessarily involve oxygen.

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, reduction both refer to reactants (molecules, ions, or atoms).

Examples of oxidation reactions:

1. Magnesium burns in oxygen: 2mg + o=2mgo White signal flare phenomenon: emits dazzling white light; Heat is released; A white powder is generated.

2. Iron burns in oxygen: 3Fe + 2O=FeO Phenomenon: Burning violently, sparks are everywhere; Heat is released; Generates a black solid (ferric tetroxide Feo) Note:

A small amount of water or fine sand should be placed at the bottom of the bottle to prevent the generated solid matter from splashing down and bursting the bottom of the bottle.

3. Copper is heated in the air: 2cu + o= =2cuo phenomenon: the copper wire turns black and is used to check whether it contains oxygen.

4. Aluminum combustion in the air: 4AL + 3O = 2alo phenomenon: emits dazzling white light, exothermic, and white solid is generated.

5. Combustion in the air in hydrogen: 2h + o=2ho High-energy fuel phenomenon: light blue flame is generated; Heat is released; Water mist appears on the inner wall of the beaker.

Not necessarily. For example, the reaction of nitrogen with oxygen to produce no during a thunderstorm is an endothermic reaction. N2(g) +O2(g) = 2NO(g) H=+ mol-1 In the first decade of the twentieth century, chemical production imitated the discharge phenomenon in nature and used the arc method to fix nitrogen (produce NO), and then produce nitric acid.

However, due to the high energy consumption and low yield, even at 3000, only a NO with a volume fraction of about 5% was obtained, which was soon replaced by the emerging ammonia industry. For example, ozone generators are widely used in drinking water sterilization, sewage treatment, food processing and preservation, pharmaceutical synthesis, space sterilization and other fields, although they appeared relatively late in China's market, but have been rapidly developed in the past 30 years. One of the main principles in ozone generators is:

3O2 === 2O3 discharge H=+ mol-1 Obviously, this is also an endothermic reaction. In fact, most reactions with O2 are exothermic because the atoms of the elements contained in the reactants can form more stable chemical bonds with O, resulting in lower energy of matter. If the chemical bonds in the reactants are more stable and the reactants are less energetic, then even with O2 in part, it is an endothermic reaction.

Not necessarily. Not necessarily. For example, the reaction of nitrogen with oxygen to produce no during a thunderstorm is an endothermic reaction.

N2(g) +O2(g) = 2NO(g) H=+ mol-1 In the first decade of the twentieth century, chemical production imitated the discharge phenomenon in nature and used the arc method to fix nitrogen (produce NO), and then produce nitric acid. However, due to the high energy consumption and low yield, even at 3000, only a NO with a volume fraction of about 5% was obtained, which was soon replaced by the emerging ammonia industry. For example, ozone generators are widely used in drinking water sterilization, sewage treatment, food processing and preservation, pharmaceutical synthesis, space sterilization and other fields, although they appeared relatively late in China's market, but have been rapidly developed in the past 30 years.

One of the main principles in ozone generators is: 3O2 === 2O3 discharge H=+ mol-1 Obviously, this is also an endothermic reaction. In fact, most reactions with O2 are exothermic because the atoms of the elements contained in the reactants can form more stable chemical bonds with O, resulting in lower energy of matter.

If the chemical bonds in the reactants are more stable and the reactants are less energetic, then even with O2 in part, it is an endothermic reaction.

Not necessarily, the reaction with oxygen is divided into combustion and slow oxidation, combustion has the phenomenon of luminescence and heat release, slow oxidation is slow heat release, there is no luminescence phenomenon, the phenomenon is not obvious, such as winemaking, food spoilage, no obvious phenomenon in a short time.

Is a reaction with oxygen involved necessarily an exothermic reaction?

Not necessarily. Not necessarily. For example, the reaction of nitrogen with oxygen to produce no during a thunderstorm is an endothermic reaction.

N2(g) +O2(g) = 2NO(g) H=+ mol-1 In the first decade of the twentieth century, chemical production imitated the discharge phenomenon in nature and used the arc method to fix nitrogen (produce NO), and then produce nitric acid. However, due to the high energy consumption and low yield, even at 3000, only a NO with a volume fraction of about 5% was obtained, which was soon replaced by the emerging ammonia industry. For example, ozone generators are widely used in drinking water sterilization, sewage treatment, food processing and preservation, pharmaceutical synthesis, space sterilization and other fields, although they appeared relatively late in China's market, but have been rapidly developed in the past 30 years.

One of the main principles in ozone generators is: 3O2 === 2O3 discharge H=+ mol-1 Obviously, this is also an endothermic reaction. In fact, most reactions with O2 are exothermic because the atoms of the elements contained in the reactants can form more stable chemical bonds with O, resulting in lower energy of matter.

If the chemical bonds in the reactants are more stable and the reactants are less energetic, then even with O2 in part, it is an endothermic reaction.

Not necessarily. Although many chemical reactions with oxygen are obvious, there are some reactions with oxygen that are not obvious.

Not necessarily, the oxidation reaction mentioned by the landlord is included in the redox reaction, the essence of the redox reaction is the transfer of electrons, and the way it manifests itself is the change of element valence. However, if oxygen can turn into ozone under certain conditions, a chemical reaction occurs. However, the valency changes from 0 valence to 0 valence, and there is no redox reaction.

So the reaction with the participation of oxygen is not necessarily an oxidation reaction.

Chemical reactions with the participation of oxygen are not necessarily obvious, and some are only endothermic or exothermic, which cannot be seen by sight.

Not necessarily, for example, there is no obvious phenomenon that aluminum reacts with oxygen to form a dense alumina film.

The reaction with the participation of oxygen is generally a redox reaction, and the redox reaction is generally an obvious phenomenon.

Not necessarily. For example, respiration and photosynthesis have oxygen involved, but there is no obvious phenomenon.

Intense oxidation reaction will have the phenomenon of luminous lamp, and slow oxidation can not see obvious changes in a short period of time, but obvious changes can be seen after accumulation for a period of time, such as food decay.