Check sibling questions

Why the mixture of ethyne and air is not used for welding though air is easily available. Instead, a mixture of ethyne and oxygen is used for welding.

 

Answer

In the process of welding, ethyne undergoes combustion and the heat produced in the process is used to melt the metals and join them together . In order to ensure that sufficient heat is produced, it is necessary that complete combustion takes place. 

Combustion of Ethyne mixed with Oxygen - Teachoo.png

Since air is a mixture of gases in which nitrogen is the predominant gas , ethylene with air is not used for welding because enough oxygen will not be available to carry out combustion. 

Combustion of Ethyne mixed with Nitrogen - Teachoo.png

So, a mixture of oxygen and ethylene is used.

Are ads bothering you?


Transcript

Why the mixture of ethyne and air is not used for welding though air is easily available. Instead, a mixture of ethyne and oxygen is used for welding. Answer In the process of welding, ethyne undergoes combustion and the heat produced in the process is used to melt the metals and join them together. In order to ensure that sufficient heat is produced, it is necessary that complete combustion takes place. Since air is a mixture of gases in which nitrogen is the predominant gas, ethylene with air is not used for welding because enough oxygen will not be available to carry out combustion. So, a mixture of oxygen and ethylene is used.

CA Maninder Singh's photo - Expert in Practical Accounts, Taxation and Efiling

Made by

CA Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Accounts and English at Teachoo