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Unit 4 Chemistry of Fire. This will be as basic as it gets. Do you remember the Periodic Table?

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Presentation on theme: "Unit 4 Chemistry of Fire. This will be as basic as it gets. Do you remember the Periodic Table?"— Presentation transcript:

1 Unit 4 Chemistry of Fire

2 This will be as basic as it gets. Do you remember the Periodic Table?

3  We will stay very basic  We will look at the states of matter and why they are important to firefighting  We will discuss the atom –but that’s about it for the atom  If you want a Chemistry Class-Take Chemistry!

4 Three States 1. Solid 2. Liquid 3. Gas Two Types 1. Organic 2. Inorganic

5 Compounds are made up of two or more elements The Periodic Table shows all the existing elements An example of a compound is wood: it consists of the elements Hydrogen, Carbon, and Oxygen, a little nitrogen and other elements Atoms and molecules are smaller units of the elements

6 Atoms are made up of a nucleus surrounded by three subatomic particles: Protons Neutrons Electrons Atoms are held together by electrical charge Molecules are made up of atoms

7 Compounds will break into smaller compounds or molecules when heated When heated, a compound will start to decompose- the temperature needed to start the decomposition process is called decomposition temperature

8 When a compound starts breaking down or decomposing it is occurring at the molecular level. The heat causes the molecules to change. The molecules start to convert to a gaseous state- that is what is actually burning

9  Organic Compounds contain hydrocarbons –meaning they are derived from living organisms  Inorganic Compounds are naturally occuring Examples of Inorganic Compounds are: Copper, Zinc, Granite, Lead

10  Boiling Point- The temperature in which the molecules in a liquid begin to break the surface tension of the liquid and begin to change to vapor  Vapor Pressure- The pressure placed on a closed container from the molecules being released by the liquid in vapor form  Vapor Density- Greater than 1 will hang lower to the ground. (Heavier than air)

11  Flash Point  Fire Point  Solubility  Specific Gravity- Greater than one will sink in water  Explosive Range (To rich or to lean- it won’t burn)

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14  Thermal Imaging Capabilities  Engineer –Assist in extinguishment or stay by pump?  Anything Else?

15  Conduction  Convection  Radiant  Direct Flame Impingement


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