Fire basics
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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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Fire Basics

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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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