After the fire from the wood burns out, ash or ash can be found in its place. To understand why, when burning firewood, ash or coals are formed, first you need to figure out what they are.
What is coal?
This substance appears after incomplete combustion of plant substances. We can assume that the material used as fuel, at the moment of contact with fire immediately begins to turn into coal.
While the log is burning, the organic component decays due to the high temperature and is scattered in space by wind through the air. That is why the burnt material is much smaller in volume than the original. What is not burned by fire is carbon, which is coal.
This material can be used to further maintain the flame, as flammable compounds still remain in it. Coals can also smolder: when the flame is already extinguished due to external interference or lack of oxygen, the substance retains a high temperature and continues to decay into simpler components.
Air enters the porous slots, contributing to the spread of heat. This property is widely used in human life, for example, in cooking, as well as in industry.
However, if you kindle firewood and leave the fire unattended, it is unlikely to go out at the stage of coal formation. For this, at the moment carbon appears, oxygen must disappear, without which the flame cannot exist. In open space, in nature, this is unlikely, so it is very rare after burning wood in their place to find coal.Most often, most of the waste, if a person has not extinguished the flame on time on his own, is ash.
What is ash?
After the fire continues to interact with the coals, the latter gradually begin to turn into ash. Due to high temperatures, carbon decomposes into ash, which is ash. It is a substance that is simple in terms of structure and does not have high strength and thermal properties. The main composition is glass particles, flame resistant, and various calcium compounds. As soon as all the wood and coals become ash, the flame goes out, because no combustible fuel remains in the fire.
Ash can be considered the last stage of life logs that have fallen into the fire. It does not accumulate heat and does not burn, which makes it of little use in everyday life.
What is formed when burning wood?
Now you can answer the main question of the article. Regardless of the size of the flame and the surrounding conditions, the tree is always first of all converted into coal. If at this moment the flame goes out for some reason, then coals will remain at the site of the fire.
When the fire burns to the end, by this time the coals have time to become ash, which remains when burning wood. It is believed that ash can be obtained immediately when burning a tree, bypassing the stage with coals, but this is not so. The procedure for the appearance and decay of the latter can be made as quick as possible if there is a high temperature and enough oxygen, but cannot be avoided.
They will remain at the place of burning of firewood ash or coals depends solely on the moment when the flame goes out.If you put out the fire early, then instead of firewood there will be coals, if you let it burn to the end, constantly maintaining the flame, only ash will remain. The latter can no longer be used as fuel, so further maintenance of the fire becomes impossible.
