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Fire Basics. Mr. McNiff CHS Forensics. The Combustion Reaction. Combustion is a rapid oxidation reaction The combination of fuel and oxygen to form carbon dioxide, water, and heat. The Combustion Reaction. Chemical reactions that give off heat are called exothermic reactions

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Presentation Transcript
fire basics

Fire Basics

Mr. McNiff

CHS

Forensics

the combustion reaction
The Combustion Reaction
  • Combustion is a rapid oxidation reaction
  • The combination of fuel and oxygen to form carbon dioxide, water, and heat
the combustion reaction1
The Combustion Reaction
  • Chemical reactions that give off heat are called exothermic reactions
  • Incomplete combustion reactions produce poisonous carbon monoxide
necessary components for combustion
Necessary Components for Combustion
  • Combustion requires a number of components as shown by the fire triangle, tetrahedron, and pentagon
necessary components for combustion1
Necessary Components for Combustion
  • The fire triangle shows the essential components as: fuel, oxygen, & heat
  • The fire tetrahedron adds free radical reactions (chain reaction)
  • The fire pentagon adds an ignition source
the combustion reaction2
The Combustion Reaction
  • There are two ways to interrupt a combustion reaction:
    • Adding water to absorb heat
    • Adding fire retardants to interrupt the chain reaction process.
nature of fuels
Nature of Fuels
  • Common fuels can be classified as solids, liquids or gases
    • Gases – fuels include hydrogen gas, natural gas, methane, and propane
    • Liquids – fuels include gasoline, fuel oil, kerosene, and ethanol
    • Solids – fuels include wood, coal, charcoal
characteristics of fuels
Characteristics of Fuels
  • Flash point– is the lowest temperature at which a liquid produces enough vapor to be ignited by a small flame
characteristics of fuels1
Characteristics of Fuels
  • Fire point (self-ignition temperature) is the temperature at which there is enough heat to cause combustion even in the absence of a source of ignition
characteristics of fuels2
Characteristics of Fuels
  • Flammable Range– is a measure of the percentage of fuel that, when mixed with air, is needed to sustain combustion
refrences
Refrences
  • Power points
    • Mike Stevens UTS Science
    • Greg Backes Morning Star
    • Peter Bilous Eastern Washington University
    • Dr. Stephen Owen Radford University
    • John Sterwood MSU Bozemen
    • David L. von Minden UCO Chemistry Department
pictures
Pictures
  • http://www.crazykens.com/pictures/Animations.htm
  • https://reich-chemistry.wikispaces.com/Combustion-+keedy+mccormack
  • http://www.squidoo.com/copoisoning
  • http://www.callahanonline.com/calani.html
  • http://www.ltfexperts.com/sportsrec.htm
  • http://www.livingstonco.ky.gov/gallery/House_Fire_2277/House_Fire_2277_009
  • http://www.norcalblogs.com/sustainable/other/
  • http://zebu.uoregon.edu/2001/ph162/l10h.html
  • http://www.flickr.com/photos/toualee/3457767266/
  • http://climateprogress.org/2008/04/16/methane-hydrates-whats-the-worst-and-best-that-could-happen/
  • http://www.energeticforum.com/renewable-energy/5247-ionization-water-fuel-13.html
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