Question

Define Combustion.

Answer 1

Combustion: A chemical process in which a substance reacts with oxygen to give off heat is called combustion.

Combustion in daily life examples are:

• Burning of Wood or Coal for household purposes.
• Burning of Petrol or Diesel for using vehicles like a car. Combustion of gas or LPG to cook.
• $$\begin{gathered} {\mathrm{CH}}_4\left(\mathrm{g}\right)+2{\mathrm{O}}_2\left(\mathrm{g}\right)\to {\mathrm{CO}}_2\left(\mathrm{g}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)+\mathrm{Heat} \\ \mathrm{Methane}\mathrm{Oxygen}\mathrm{Carbon}\mathrm{dioxide}\mathrm{Water} \end{gathered}$$
• Combustion is an exothermic reaction as heat energy is released during this reaction.
• Exothermic reaction: A reaction in which energy is released in the form of light or heat.