The properties and uses of oxygen, what properties does oxygen have

Physical properties of oxygen: one of the main components of air, heavier than air, with a density of grams in grams under standard conditions (0 and atmospheric pressure 101325 Pa). Colorless, odorless, tasteless.

It has very little solubility in water. At a pressure of 101 kPa, oxygen turns into a pale blue liquid at about -180 degrees Celsius and a snowflake-like pale blue solid at about -218 degrees Celsius. Oxygen molecules are paramagnetic.

Oxygen Chemistry:

Oxygen is chemically more reactive. With the exception of rare gases and less reactive metallic elements such as gold, platinum and silver, most elements can react with oxygen.

Oxidation of oxygen.

Oxygen reacts with elemental matter.

Reaction of oxygen with metals (sodium, potassium, calcium, etc.).

Reaction of oxygen with active metals (iron, magnesium, zinc, aluminum, copper, etc.).

Reaction of oxygen with non-metals (sulfur, hydrocarbon, phosphorus, etc.).

Oxygen reacts with compounds.

Reaction of oxygen with oxides (carbon monoxide, nitric oxide, nitrogen dioxide, etc.).

Reaction of oxygen with sulfides (hydrogen sulfide, Fes2, etc.).

Oxygen and the combustion of organic matter (almost all organic matter).

Oxidation of oxygen with organic matter (e.g., alcohols are oxidized by oxygen to aldehydes).

Oxygen reacts with other compounds.

Ammonia followed by oxygen (ignition, catalytic oxidation).

Uses: Smelting process.

In the process of steelmaking, high-purity oxygen is blown, and the oxygen reacts with carbon and phosphorus, sulfur, silicon, etc., which not only reduces the carbon content of the steel, but also helps to remove impurities such as phosphorus, sulfur and silicon. In addition, the heat generated during the oxidation process is sufficient to maintain the temperature required for the steelmaking process, so the oxygen blowing not only shortens the smelting time, but also improves the quality of the steel. When blast furnace ironmaking, increasing the oxygen concentration in the blast can reduce the coke ratio and increase the output.

In non-ferrous metal smelting, the use of oxygen enrichment can also shorten the smelting time and increase the output.

Chemical industry. In the production of synthetic ammonia, oxygen is mainly used for the oxidation of raw gas to strengthen the process and increase fertilizer production. Another example is the high-temperature cracking of heavy oil, as well as the gasification of pulverized coal, etc., in the defense industry.

Liquid oxygen is the best accelerant for modern rockets, and liquid oxygen is also needed as an oxidant in supersonic aircraft.

Healthcare. Breathing: When used in hypoxic, hypoxic or anaerobic environments, such as diving operations, mountaineering, high-altitude flight, astronautics, medical rescue, etc.

Oxygen is oxidizing.

Physical properties: Oxygen is one of the components of air, colorless, odorless, and tasteless. Oxygen is heavier than air, has a density of grams in the standard condition (0 and atmospheric pressure 101325 Pa), and is soluble in water, but with very little solubility. At a pressure of 101 kPa, oxygen turns into a pale blue liquid at about -180 degrees Celsius and a snowflake-like pale blue solid at about -218 degrees Celsius.

Chemical properties. Oxygen is chemically more reactive. With the exception of rare gases and small reactive metal elements such as gold, platinum, and silver, most of the elements can react with oxygen, and these reactions are called oxidation reactions, and the compounds produced by the reactions (composed of two elements, one of which is oxygen) are called oxides. In general, aqueous solutions of non-metallic oxides are acidic, while alkali metals or alkaline earth metal oxides are alkaline.

In addition, almost all organic compounds can be violently burned in oxygen to form carbon dioxide and water. In chemistry, the chemical reaction between a substance and oxygen was defined as an oxidation reaction

reaction)。Diagram of ring structure and chain structure.

Physical Properties:

The density is larger than that of air, it is insoluble in water, and it is a colorless and odorless gas at room temperature.

Chemical properties: flammability, oxidation, can react with many metal elements, is a common oxidant, widely found in nature, accounting for about 21% of the total air.

Supports combustion, supplies breathing.

The density is greater than that of air, insoluble in water, flammable, oxidizing, colorless and odorless.

OneOxygen has both physical and chemical properties. The details are as follows:

Physical properties of oxygen:Typically, oxygen is a colorless and odorless gas that is slightly denser than air and is not easily soluble in water. Under certain conditions, it can be liquefied into a light blue liquid or solidified into a light blue solid.

The fact that fish and shrimp in rivers and seawater can survive indicates that there is oxygen dissolved in the water in nature.

Chemical properties of oxygen:Oxygen is a chemically reactive gas, which provides oxygen in the oxidation reaction, has oxidizing properties, and is a common oxidizing agent.

Second, oxygen has a very wide range of uses. It is mainly to supply respiration, support combustion and reaction exothermy

1. Supply breathing: Under normal circumstances, only air is needed for breathing. However, oxygen is often used in hypoxic, hypoxic or anaerobic environments, such as diving operations, mountaineering, high-altitude flight, astronautics, medical rescue, etc.

2. Support combustion: Under normal circumstances, only air is needed for combustion. However, when special requirements such as high temperature and rapid combustion are required, such as blast ironmaking, converter steelmaking, etc., oxygen-enriched air or oxygen needs to be used.

3. Reaction exothermic: a large amount of heat released during the oxidation reaction, especially the combustion reaction, can be utilized. For example, coal-fired heating, thermal power generation; Industrially, the oxyylene flame generated when acetylene (C2H2) is burned in oxygen is used to weld or cut metals, and the oxyylene flame can produce more than 3000 high temperatures.

Oxygen is a colorless and odorless gas with relatively active chemical properties, it can oxidize with metals, non-metals, compounds and other special substances, the intensity of the reaction varies according to different conditions, it can be manifested as slow oxidation, burning, explosion, etc., and a large amount of heat is released in the reaction.

Because oxygen is a chemically reactive gas, it can react violently with many substances. Oxygen has a wide range of uses in production and life: the use of substances in the air or oxygen combustion to produce a large amount of heat, the preparation of welding torches and cutting guns, the gas welding and gas cutting of metals; In the production of ironmaking and steelmaking, air is introduced (using oxygen) to increase the furnace temperature, accelerate the smelting process, and improve the smelting quality; Preparation of liquid oxygen explosives and liquid oxygen accelerants in rockets.

Oxygen can be used to provide oxygen in hypoxic environments such as emergency patients, high-altitude diving, and mountaineering. Now people's material and spiritual life is greatly enriched, following the song hall, dance hall, bar, oxygen bar has become a rising star, so that people living in busy cities can sit down, breathe oxygen rest, relax and adjust. The density of oxygen is denser than that of air, and it is not easily soluble in water, so oxygen is collected by upward air discharge or drainage.

Since oxygen has the property of supporting combustion, the spark-bearing wooden strip is extended into the gas collector cylinder containing oxygen, and the wooden strip is re-ignited, which can be determined to contain oxygen, and this phenomenon is used for oxygen collection and verification operations. The properties of oxygen can also be used to prevent disasters caused by the reaction of substances with oxygen. For example, some flammable materials should be ventilated and dissipated to prevent spontaneous combustion; The surface of steel products is coated with a protective layer to prevent rust.