Combustion

• What is the definition of combustion?


  Combustion is a chemical reaction where a substance reacts rapidly with oxygen, producing heat and light.
• What is another term for combustion?


  Burning
• What are the typical components involved in combustion?


  A fuel and an oxidizer, usually oxygen from the air.
• What happens when you light a candle?

  The wax (fuel) reacts with oxygen in the air, producing a flame.
• What are the three main components of combustion known as the fire triangle?


  • Fuel: The substance that burns (e.g., wood, petrol, natural gas)
  • Oxygen: Usually from the air, it supports the burning process
  • Heat: Needed to start and maintain the reaction
• What must be present for combustion to occur and continue?


  All three components of the fire triangle: fuel, oxygen, and heat.
• What type of combustion occurs when there is sufficient oxygen?


  Complete combustion
• What are the main products of complete combustion?


  Carbon dioxide and water, along with heat and light.
• What type of combustion occurs when there is insufficient oxygen?


  Incomplete combustion
• What are the products of incomplete combustion?


  Carbon monoxide, carbon (soot), some carbon dioxide, less water, heat, and light.
• What is an example of complete combustion?


  Burning of natural gas in a well-adjusted gas stove.
• What is an example of incomplete combustion?


  Burning wood in a fireplace with limited airflow.
• What are the products of complete combustion?


  • Carbon dioxide (CO₂)
  • Water (H₂O) - often as water vapor
  • Heat
  • Light
• Why is understanding combustion important?


  • Improves efficiency
  • Reduces pollution
  • Develops cleaner energy sources