Why does ethyne (acetylene) burn with a sooty flame?
Last updated date: 26th Mar 2023
•
Total views: 207.6k
•
Views today: 4.84k
Answer
207.6k+ views
Hint :We know that in order to solve this question, firstly we must know the concept of complete combustion and incomplete combustion. Then we will do both the reactions of ethane with oxygen and ethane with air to check where the complete combustion occurs to get the required result.
Complete Step By Step Answer:
We must know complete combustion of ethane and incomplete combustion of ethane to proceed towards the answer. The complete combustion of ethane a combustion reaction has a general reaction of fuel and oxygen to form carbon dioxide and hydro-oxide. Incomplete combustion of ethane. Ethyne undergoes incomplete combustion to form carbon dioxide, carbon monoxide and water vapour. Now, when ethyne (acetylene) is burnt in air, it produces a sooty flame. This is due to incomplete combustion caused by the limited supply of oxygen present in the air that is not enough to melt metals for metals.
This oxy-acetylene flame is used for welding and it is not possible to attain such a high temperature with air or without mixing oxygen. Due to this reason, a mixture of ethyne and air is not used for welding whereas mixture ethyne burnt in oxygen is used for welding purposes.
Therefore, Ethyne (acetylene) burns with a sooty flame because ethyne is an unsaturated hydrocarbon and the percentage of carbon in these hydrocarbons is comparatively higher which does not get oxidised completely in oxygen or air.
Note :
Remember that whenever we face such a type of problem, one can get confused with complete combustion and incomplete combustion so we must know the difference between complete combustion and incomplete combustion to get the required result.
Complete Step By Step Answer:
We must know complete combustion of ethane and incomplete combustion of ethane to proceed towards the answer. The complete combustion of ethane a combustion reaction has a general reaction of fuel and oxygen to form carbon dioxide and hydro-oxide. Incomplete combustion of ethane. Ethyne undergoes incomplete combustion to form carbon dioxide, carbon monoxide and water vapour. Now, when ethyne (acetylene) is burnt in air, it produces a sooty flame. This is due to incomplete combustion caused by the limited supply of oxygen present in the air that is not enough to melt metals for metals.
This oxy-acetylene flame is used for welding and it is not possible to attain such a high temperature with air or without mixing oxygen. Due to this reason, a mixture of ethyne and air is not used for welding whereas mixture ethyne burnt in oxygen is used for welding purposes.
Therefore, Ethyne (acetylene) burns with a sooty flame because ethyne is an unsaturated hydrocarbon and the percentage of carbon in these hydrocarbons is comparatively higher which does not get oxidised completely in oxygen or air.
Note :
Remember that whenever we face such a type of problem, one can get confused with complete combustion and incomplete combustion so we must know the difference between complete combustion and incomplete combustion to get the required result.
Recently Updated Pages
In India on the occasion of marriages the fireworks class 12 chemistry JEE_Main

The alkaline earth metals Ba Sr Ca and Mg may be arranged class 12 chemistry JEE_Main

Which of the following has the highest electrode potential class 12 chemistry JEE_Main

Which of the following is a true peroxide A rmSrmOrm2 class 12 chemistry JEE_Main

Which element possesses the biggest atomic radii A class 11 chemistry JEE_Main

Phosphine is obtained from the following ore A Calcium class 12 chemistry JEE_Main
