Question

Burning acetylene in oxygen under appropriate conditions produces a very hot flame. What is the hot flame used for?

Answer 1

• Acetylene$\left({\mathrm{C}}_2{\mathrm{H}}_2\right)$ produces a very hot flame on burning in Oxygen $\left(O_2\right)$ and the hot flame is known as oxy-acetylene.
• This oxy-acetylene flame is used for welding purpose and to the cut steel.
• The chemical equation of burning Acetylene in Oxygen is as represented below:

$2\underset{\left(\mathrm{Acetylene}\right)}{{\mathrm{C}}_2{\mathrm{H}}_2\left(\mathrm{g}\right)}+5\underset{\left(\mathrm{Oxygen}\right)}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\to \underset{\left(\mathrm{Carbon}\mathrm{dioxide}\right)}{4{\mathrm{CO}}_2\left(\mathrm{g}\right)}+2\underset{\left(\mathrm{Water}\right)}{{\mathrm{H}}_2\mathrm{O}}\left(\mathrm{l}\right)+\mathrm{heat}$