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COMBUSTION AND FLAME

introduction to combustion and flame

alice15
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COMBUSTION AND FLAME

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  1. COMBUSTION AND FLAME COMBUSTION AND FLAME

  2. Pre assessment 1) --------is the fuel for our body 2) Which gas supports combustion (Hydrogen.Oxygen, Carbondioxide) 3) Which non-metal is stored in water ( sodium, Phosphorous) 4) Combustion is an ------------(exothermic/endothermic ) reaction.

  3. LEARNING OBJECTIVEs • Define combustion • Explain the conditions needed for combustion

  4. COMBUSTION • A chemical process in which a substance reacts with Oxygen to give off heat and light is called combustion • Substances that can burn easily to produce heat and light are called combustible substances • Substances that do not burn are called non-combustible substances

  5. https://www.youtube.com/watch?v=c3Ldo0qcRHA

  6. Conditions needed for combustion • Activity

  7. BREAK OUT ROOMS • Students move into the breakout rooms and discuss the conditions for combustion and present their points • All will be back in 5 mins

  8. CONDITIONS NEEDED FOR COMBUSTION

  9. FUEL • 1 Fuel ---- Any substance which reacts with Oxygen to release heat energy • Eg .wood, petrol, diesel ,LPG, kerosene, coal

  10. Ignition Temperature • https://www.youtube.com/watch?v=2W2bpDmyiVg

  11. Ignition temperature • The lowest temperature at which a combustible substance when heated catches fire continues to burn • Substances with low ignition temperature Catch fire easily and called as inflammable substance alcohol, sodium, white phosphorous, petrol

  12. FA • Define combustion? • What are the conditions needed for combustion? • Green grass does not catch fire but dry grass catch fire easily • Wet paper take longer time to burn. Why? • A piece of paper can be burnt with a match stick but not a log of wood.Explain • What is the disadvantage of having high ignition temperature for a fuel?

  13. DA 1 Substances which catch fire easily are called--- 2 minimum temperature at which a substance catches fire is called---- 3 Respiration is a process of------ • Cotton clothes are ------(Combustible/non-combustible) 5  Like fuel the sun also provides heat and light. The process taking place in the sun is called         a. Combustion b. Nuclear process

  14. H.W –Why Lighter cubes are used for igniting charcoal fire

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