Question

Write the type of reaction. When ethene is burnt in the presence of oxygen to form carbon.

Answer 1

Combustion reaction:

• Combustion reaction is the one that requires oxygen to react with some substances and produces heat and light.
• It is a highly exothermic reaction.

Reaction of ethene with Oxygen:

• When ethene$\left({\mathrm{C}}_2{\mathrm{H}}_4\right)$ is burnt in the presence of air, it produces carbon dioxide$\left({\mathrm{CO}}_2\right)$ and water along with heat$\left({\mathrm{H}}_2\mathrm{O}\right)$.
• The chemical reaction can be depicted as:

${\mathrm{C}}_2{\mathrm{H}}_4\left(\mathrm{g}\right)+3{\mathrm{O}}_2\left(\mathrm{g}\right)\to 2{\mathrm{CO}}_2\left(\mathrm{g}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+\mathrm{Heat}$

Hence, this type of reaction is a combustion reaction.