Required Answer :-
Any reaction in which oxygen gas reacts with another substance is a combustion reaction
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As We know that, combustion reaction is usually a reaction that produces fire. Combustion takes place at an elevated temperature. It is a heat releasing (exothermic), redox chemical reaction that usually occurs between a fuel and oxidizing agent (mostly oxygen of the atmosphere). The products released are often gaseous, and the resultant mixture is commonly called smoke. The products of combustion are called oxides.
Types of Combustion Reactions
- 1. Complete Combustion: Complete combustion takes place when a fuel burns completely to produce carbon dioxide and heat with a sufficient supply of oxygen.
- 2. Incomplete Combustion: In the case of a limited or partial supply of oxygen, the fuel burns incompletely, thereby producing carbon monoxide in place of carbon dioxide.
Some Examples of Combustion Reactions
- Our vehicles such as cars, bikes, etc. run on fossil fuels. These fuels undergo a combustion reaction with oxygen to run the engine.
- Burning of wood or other solid fuels such as coal in winters: The carbon content present in wood or coal reacts with oxygen of the atmosphere to release heat and form other gaseous products.
- The liquefied petroleum gas is released from the cylinders through the holes in the burner. On complete combustion, it produces a clear blue flame. If the supply of oxygen is limited, the same flame turns yellowish and sooty.
As we already know, a combustion reaction cannot proceed in the absence of oxygen. For burning or combustion to take place, oxygen should be essentially present because it is the only gas that supports burning. A combustion reaction will always occur when a substance reacts with oxygen to release energy. For example, when methane burns in oxygen, it releases carbon dioxide and water. The formation of carbon dioxide shows the carbon present in the methane has undergone oxidation
The Methane is the major constituent of almost all hydrocarbons. Its combustion is represented by the following equation:
- CH4 + 2O2 -------> CO2+ 2H2O+ energy
- Ethane is a saturated hydrocarbon. When it reacts with oxygen, it produces water and carbon dioxide.
- 2C2H6 + 7O2 -------> 4CO2 + 6H2O + energy
- The food that we eat gets converted into glucose by the body. In the process of respiration, glucose is oxidized to produce carbon dioxide, water and energy. This energy is utilized for carrying out life processes.
- C6H12O6 + 6O2 ------> 6CO2+ 6H2O + energy
