How does a combustion reaction works?

Answer 1

Combustion or burning is the sequence of exothermic chemical reactions between a fuel and an oxidant accompanied by the production of heat and conversion of chemical species. The release of heat can result in the production of light in the form of either glowing or a flame. Most fuels of interest are organic compounds (especially hydrocarbon) in the gas, liquid or solid phase.

In a complete combustion reaction, a compound reacts with an oxidizing element, such as oxygen or fluorine, and the products are compounds of each element in the fuel with the oxidizing element. For example:CH4 + 2O2 → CO2 + 2H2O + energyCH2S + 6F2 → CF4 + 2HF + SF6

A simpler example can be seen in the combustion of hydrogen and oxygen, which is a commonly used reaction in rocket engines:2H2 + O2 → 2H2O(g) + heat

The result is water vapor.

In the large majority of industrial applications of combustion and in fires, air is the source of oxygen (O2). In air, each kg (lbm) of oxygen is mixed with approximately 3.76 kg (lbm) of nitrogen. The resultant flue gas from the combustion will contain nitrogen:CH4 + 2O2 + 7.52N2 → CO2 + 2H2O + 7.52N2 + heat

Answer 2

A combustion reaction is the reaction of a flammable substance with oxygen.

Oxygen is very reactive (as it is the second most reactive element after F) so will react with most other elements.

In a complete combustion reaction, the fuel and oxygen are converted into Water and Carbon dioxide.

For example the combustion of methane is;

CH4 + 2 O2 → CO2 + 2 H2O

By this is nearly impossible as there is only 21%ish Oxygen in the Air.

So 2 CH4 + 3 O2 → 2 CO + 4 H2O is often a more accurate description of the reaction.

Answer 3

A combustion reaction involves the three reactants from the fire triangle, heat, oxygen, and fuel.

Answer 4

carbon dioxide + water