Question

A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used?​

Answer 1

Answer

2HC ≡ CH + 5O2 → 4CO2 + 2H2O + Heat

When ethyne is burnt in air, it gives a sooty flame. This is due to incomplete combustion caused by limited supply of air. However, if ethyne is burnt with oxygen, it gives a clean flame with temperature 3000°C because of complete combustion. This oxy-acetylene flame is used for welding. It is not possible to attain such a high temperature without mixing oxygen. This is the reason why a mixture of ethyne and air is not used.

Answer 2

Answer:

When Ethyne is Burn in Air. it Gives a sooty flame . This is due to incomplete combustion caused by limitted supply of air . However Ethyne is burn with Oxygen , It Gives a clean flame with temperature 3000°C Because of Complete Combustion . This Oxygen Acetylene Flame is used for Welding

A Mixture of Ethyne and air is not used Because It Gives a sooty flame . This is Due to Incomplete Combustion which is caused by limited supply of air

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