Nitrogen

Nitrogen definition

It is important to study and understand all gases in detail, as we find that gases are of great importance and are involved in many daily transactions that no one can do without.

These gases were present in the atmosphere and in the air in known quantities. so that there is a proper balance in life.

Knowing the uses that nitrogen gas comes in, we will appreciate its great importance, which we will never be able to forget no matter what.

Nitrogen in life

There is no doubt that this gas must be transformed into significant compounds into the atmosphere. It is important that this is done so that there is preservation of all living organisms. We find that its importance with the plants lies in its transformation into ammonia into the soil, and it grows the plant in a healthy manner, and there is also a protein conversion that are very important for animals.

Once these animals have fed these plants, we find that the nitrogenous compounds return to the soil through the waste of these animals, then the bacteria of the soil convert the nitrogen into this gas called nitrogen gaseous and the cycle is repeated. so that nitrogen gaseous is present in the atmosphere without missing from life if this gas was not present, there would be no life because of its great importance and involvement in many important issues and beneficial for all.

nitrogen fixation

La fixation biologique de l’azote est un processus qui permet de produire des substances protéiques à partir de l’azote gazeux présent dans l’atmosphère et l’environnement.

C’est le processus de réduction enzymatique de N2 (azote moléculaire) en azote ammoniacal, ou ammoniac (NH3)  : cette forme de N combiné, appelée intermédiaire-clé, représente la fin de la réaction de fixation et le début de l’incorporation de l’azote fixé dans le squelette carboné. Dans le système biologique fixateur de N2 les conditions optimales de la catalyse biologique correspondent à une pression de 0,2 à 1,0 atm de N2 et une température de 30-35°C, alors que les conditions de la catalyse chimique sont très sévères : pression de 250-1.000 atm de N2 et température de 450°C

Known uses of gas nitrogen

We see that nitrogen is of great importance in life that can not be exempted with other gases, and we find that among these uses are :

  • It has an important role in the preservation of food and also drugs if they are transported in another place.
  • He works to provide fertilizers for agriculture, so that it is possible to cultivate only by manure, so it has an important role in agriculture as well, and it is known in this area is ammonia So we find that everyone knows its great importance in agricultural land.
  • It is very useful in the manufacture of fuel for airplane, and it is very important because it protects against any risk of explosion that could happen, so it can be seen that it reduces inflammation and it makes great safety. From use, when there is gas that does this good protection, it must be exploited enormously, so no other gas can be used because it is really very important.
  • It is very important in the manufacture of drugs because it provides the appropriate atmosphere for this manufacture, the low heat it provides a lot contributes to it, so we find that its role is important in the healing of diseases thanks to this. which makes it important gas in that.
  • It can also be used with lamps and it is in incandescent lamps if the argon is not available, which is the best because it is widely available.
  • It is also important to use it with tires, whether for cars or aircraft, its lack of ignition makes its use very important, the lack of ignition is preferable to use it in what is useful And valid in the tires, it is an advantage that is not found in many gases that characterize the gas nitrogen.
  • We also find that it penetrates into the house in the detergents that every woman needs, and this is easily in ammonia, so every woman is looking for all that is good and suitable for her house and her cleanliness, and So we find that it is present in every house, and we do not find that there is a house that does not contain cleaning tools, so it’s with us anywhere.
  • It is important to know that nitrogen is of great importance in storing flammable materials such as oil, so when stored, this storage is done by nitrogen gaseous, and we also find that this gas is of great importance in the treatment of the skin using characteristic cooling.

How does nitrogen turn into a liquid state?

We find that it is transformed into this liquid state when exposed to a low temperature, we therefore find that it becomes liquid, hence the name of liquid nitrogen as it has passed from its gaseous state to the liquid state.

Therefore, we find that it has many uses you are looking for and which you are very needed, and it is characterized by low density, which is very little than water.

And we find that when it is exposed to anything, it becomes frozen quickly and without any delay, and we find that this icing that occurs is not only for things, but if we do not pay good attention to treat it, it will harm hands. Verry much.

Therefore, when used, it must be ensured that no one is injured by manipulating it and during use. Skin problems that affect people later.

Specifications and properties known to gas nitrogen

We find that this gas has several specifications, the most important thing is that it does not smell, we can not feel its smell and know it, moreover it has neither color nor taste, and it is Also non-metallic, and we find that it uses a well-known symbol which is the letter n and we find that the atomic number it bears is the number seven, and we find that it is sufficiently available in the atmosphere.

We find that there are physical and chemical properties, and one of the physical properties is that nitrogen is considered an inert gas, and as we mentioned, it is odorless and also tasteless or color, As we find that it is characterized by a boiling point of one hundred and ninety-six degrees Celsius, as well as we find that its freezing is two hundred and ten degrees Celsius.

As for the chemical properties, it is formed by the union of two nitrogen atoms, and as we mentioned, the symbol is N, and we find that it has several numbers of oxidation. With lithium to form lithium nitride, not just that, but it also reacts with hydrogen to form nitrogen, ammonia as well as hydrazine.

Nitrogen oxide

Les oxydes d’azote, de formule chimique NOx , peuvent se former par combinaison de l’oxygène et de l’azote de l’air lors de phénomènes naturels (orages, éruptions volcaniques). Ils peuvent également se produire lors d’incendies de forêt ou de matières azotées.

La principale source est anthropique (humaine) : combustion des combustibles fossiles (charbon, fioul, gaz naturel). Les échappements d’automobiles et plus particulièrement les véhicules diesel représentent une partie importante de la pollution atmosphérique par les NOx. La fermentation de grains humides stockés en silos est également source d’exposition aux NOx.

Les NOx interviennent dans le processus de formation de l’ozone dans la basse atmosphère, ainsi que des acides.

Le monoxyde d’azote (NO) est issu des phénomènes de combustion à haute température par oxydation de l’azote de l’air. A température ambiante, le NO est instable et réagit avec l’oxygène pour former du dioxyde d’azote (NO2) appelé polluant secondaire. Le NO2 est un gaz très toxique par inhalation.

Dans l’air ambiant, le NO2 est essentiellement issu des sources de combustion automobile, industrielle et thermique tandis que sa présence à l’intérieur des habitations est essentiellement liée à l’utilisation de chauffages au fuel, de cuisinières à gaz et à la fumée de tabac.

Dans l’eau et les sols humides, le dioxyde d’azote réagit pour donner de l’acide nitrique.

Nitrogen dioxide

Le dioxyde d’azote (NO2) se forme dans l’atmosphère à partir du monoxyde d’azote (NO) qui se dégage essentiellement lors de la combustion de combustibles fossiles, dans la circulation par exemple. Le dioxyde d’azote se transforme dans l’atmosphère en acide nitrique, qui retombe au sol et sur la végétation. Cet acide contribue, en association avec d’autres polluants, à l’acidification des milieux naturels. Les concentrations de NO et de NO2 augmentées en règle générale dans les villes de pointe. Les émissions anthropiques de NO2 proviennent principalement de la combustion (chauffage, production d’électricité, moteurs des véhicules automobiles et des bateaux).

Le dioxyde d’azote fait partie de la famille des oxydes d’azote. Selon la Directive sur l’air ambiant et un air pur n Europe de 2008, les oxydes d’azote sont la somme du rapport de mélange en volume (ppbv) de monoxyde d’azote (oxyde nitrique) et de dioxyde d’azote, exprimé en unités de concentration massique de dioxyde d’azote (μg/m3)

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