Conditions Necessary for Combustion

There are 3 Essential Requirements for Producing Fire

• Fuel
  Presence of Fuel (Combustible Substance)

• Air
  Presence of Air to supply oxygen

• Heat
  Presence of Heat to reach ignition temperature

Let's study it one by one

Presence of Fuel  

Fire can be produced only with help of a fuel or combustible substance

Substance which reacts with oxygen to produce heat is called combustible substance or fuel

Example - Coal, Petrol, Diesel

Presence of Air

Air is required to supply oxygen

If there is no air, then combustion is not possible

Presence of Heat

Heat is required to raise temperature beyond ignition temperature

An object catches fire only when ignition temperature is reached

Example

When a matchstick is lighted, it causes fire

This happens because all 3 conditions are satisfied

• Fuel
  Chemicals on side of matchbox act as fuel(combustible substance)
• Air
  When Matchstick is lighted,oxygen is available in the air which supports lighting
• Ignition Temperature
  When matchstick is rubbed on sides of matchbox,it produces heat due to friction
  Due to which fuel reaches its ignition temperature

Questions

NCERT Question 1 - List conditions under which combustion can take place.

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