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Word Count: 297
1 Oxidation The combination of a substance with oxygen A reaction in which the atoms in an element lose electrons and the valence of the element is correspondingly increased 2 Heat of combustion The excess energy liberated as heat and also light many times during oxidation 3 Exothermic Reactions such as heat of combustion with such things as methane Endothermic When something needs more energy then what is liberated 4 Ignition temperature The heat necessary for the initial action to start 5 Rate or speed of reaction The faster the molecules move the faster they collide the hotter it is the faster the reaction is performed 6 Flash point The lowest temperature at which a liquid gives off sufficient vapor to form a mixture with air that will form a mixture that will be combustible 7 Pyrolysis Decomposition or transformation of a compound caused by heat 8 Flammable range The concentration range necessary for a certain mixture for a reaction to occur It is the concentration range between upper and lower limits 9 Smouldering Being in a state of suppressed activity quiet but not dead 10 Spontaneous combustion When the conditions are just right in a natural environment due to heat and lack of ventilation that gases are built up and the ignition temperature is reached causing a spontaneous fire 11 Oxidizing agent Chemicals that supply oxygen 12 Where the fire started easily marked in some cases When arson is suspected 3 quarts of ash and soot are collected at what is believed to be the point of origin It is identified according to how flammable it is and what chance it was in being used to start and continue the fire The evidence is collected in metal jars with lids It is analyzed by testing out similar chemicals in similar fire conditions seeing if similar residues are left
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