Does a burning fire produce hydrogen?

Oxygen is required for fire burning, and the air contains oxygen, and hydrogen combustion in the air produces a light blue flame <>

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The chemical equation for the combustion of hydrogen: 2H2 + O2 = Ignition = 2H2O. Hydrogen is blue when burned in air, emitting light and exothermic.

The glass is covered with water droplets on the wall above the flame, and the glass heats up. When hydrogen is in a certain percentage in the air, it ignites because hydrogen reacts with oxygen.

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Extended Information: Although hydrogen is non-toxic and physiologically inert to the human body, if the hydrogen content in the air increases, it will cause hypoxic asphyxia. As with all cryogenic liquids, direct contact with liquid hydrogen can cause frostbite.

The overflow of liquid hydrogen and the sudden evaporation of a large area will also cause environmental hypoxia, and may form a **mixture** with the air, causing a combustion accident**. Mixed with air can form a **sexual mixture, which will occur when exposed to heat or open flame**. The gas is lighter than air, and when used and stored indoors, the air leakage rises and stays on the roof, which is not easy to discharge, and it will cause sparks.

Hydrogen reacts violently with halogens such as fluorine, chlorine, and bromine.

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Because hydrogen is a flammable gas, even if it is generated, it reacts with oxygen during combustion to form water.

Pure hydrogen burns quietly in the air, producing a pale blue flame, which is generated by water droplets on the upper wall of the flame by covering the glass cup, and the glass becomes hot. Hydrogen, with the chemical formula H and molecular weight, is a highly flammable gas at room temperature and pressure.

Hydrogen is the least dense gas known in the world, and the density of hydrogen is only 1 14 of air, that is, at 1 standard atmosphere.

and 0, the density of hydrogen is. So hydrogen can be used as an airship, a hydrogen balloon.

(because hydrogen is flammable and not safe, airships are now mostly filled with helium).

Hydrogen is safe and contraindicated.

Areas where hydrogen is used should be well ventilated. Ensure that the maximum content of hydrogen in the air does not exceed 1% (volume).

The inner roof plane of a building where hydrogen is present should be flat to prevent the accumulation of hydrogen in the recess at the top. The top of the building or the upper part of the external wall should be provided with air windows or exhaust holes. The vents should be located at the highest point and towards a safe area.

There shall be no open flame within at least 10m of the vicinity of the hydrogen real bottle room and the empty bottle room, and it is forbidden to discharge hydrogen in the hydrogen system inside the building.

Hydrogen storage containers should be mixed with oxygen, compressed air, halogens.

Oxidants and other combustion-supporting gas cylinders are stored in isolation.

The above content refers to Encyclopedia - Hydrogen Combustion.

Hydrogen burns blue in the air, glows and releases heat, and water droplets are generated on the upper wall of the glass cup cover of the glass, and the glass becomes hot; When hydrogen is in a certain percentage in the air, it ignites because hydrogen reacts with oxygen.

When pure hydrogen is ignited, it is the hydrogen molecules and oxygen molecules that come into contact with oxygen at the ignition site, that is, they are in contact at the catheter orifice, while there are only hydrogen molecules and no oxygen molecules in the catheter, and no chemical reaction occurs in the catheter; When the hydrogen is not pure, the hydrogen in the conduit has been in full contact with the oxygen molecules, and when the limit is reached, the hydrogen and oxygen molecules in the conduit and the container have been ignited, and a violent chemical reaction occurs, because the chemical reaction at this time occurs in a limited space, and this reaction needs to release a large amount of heat, so that the gas produced expands rapidly and produces;

When the proportion of hydrogen is higher than the upper limit of the limit of the air balance or lower than the lower limit, because there is a deficiency of hydrogen or oxygen, it is a calm combustion, if it is within the limit, the ratio of the two is appropriate, the reaction speed is very fast, and the heat accumulates rapidly and in large quantities, resulting in **.

The phenomenon of hydrogen combustion is: pure hydrogen ignited in oxygen can burn quietly, produce a light blue flame, release a large amount of heat, cover the flame with a cold and dry beaker, and there is a water mist on the wall of the cup; Hydrogen gases mixed with oxygen can ignite**.

Hydrogen was first synthesized in the early 16th century, when metals were placed in strong acids. In 1766-81, Cavendish discovered that hydrogen was a different gas than previously discovered, producing water when burned. Hydrogen is a highly flammable, colorless, transparent, odorless and tasteless gas at room temperature and pressure.

Hydrogen is a gas that is less dense than air. Because hydrogen is poorly soluble in water, it can be collected using the drain gas collection method. In addition, at a pressure of 101 kPa and a temperature of -252, hydrogen can be converted into a colorless liquid. -259, it turns into a snowy solid.

At room temperature, hydrogen is very stable and not easy to react with other substances. But when conditions change, it's a different story. For example, hydrogen has strong activity after being adsorbed by metals such as palladium or platinum.

Palladium metal has the strongest adsorption effect on hydrogen.