1 / 15

Fire Basics

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

vail
Télécharger la présentation

Fire Basics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fire Basics Mr. McNiff CHS Forensics

  2. The Combustion Reaction • Combustion is a rapid oxidation reaction • The combination of fuel and oxygen to form carbon dioxide, water, and heat

  3. The Combustion Reaction • Chemical reactions that give off heat are called exothermic reactions • Incomplete combustion reactions produce poisonous carbon monoxide

  4. Necessary Components for Combustion • Combustion requires a number of components as shown by the fire triangle, tetrahedron, and pentagon

  5. 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

  6. 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.

  7. 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

  8. Characteristics of Fuels • Flash point– is the lowest temperature at which a liquid produces enough vapor to be ignited by a small flame

  9. 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

  10. Characteristics of Fuels • Flammable Range– is a measure of the percentage of fuel that, when mixed with air, is needed to sustain combustion

  11. 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

  12. 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

More Related