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A mixture of oxygen and ethyne is burnt for welding. Can you tell why a mixture of ethyne and air is not used?
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.
Why is the conversion of ethanol to ethanoic acid an oxidation reaction?
Conversion of ethanol to ethanoic acid is an oxidation reaction because of more oxygen atoms getting attached to the carbon atoms, thus getting the carbon atoms oxidized.
And if you burn ethyne in air (79% N2 and 21% O2) instead of 100 % O2, it would not combust completely, thus forming C and CO and a resultant sooty flame.
Thats why you need oxy-acetylene( oxy-ethyne) mixture instead of aero-ethyne mixture for welding.
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