PSY100Y5 Lecture Notes - Lecture 16: Pentaerythritol Tetranitrate, Potassium Nitrate, Acetone Peroxide
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PSY100Y5 Full Course Notes
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16. 4 describe how to collect physical evidence at the scene of a suspected arson. 16. 1 list the conditions necessary to initiate and sustain combustion. Final determination of the cause of a fire must consider numerous factors and requires an extensive on-site investigation. Oxidation: combination of oxygen with other substances to produce new substances. Energy: ability or potential of a system or material to do work. Combustion: rapid combination of oxygen with another substance, accompanied by production of noticeable heat and light. Exothermic reaction: chemical transformation in which heat energy is liberated. Endothermic reaction: chemical transformation in which heat energy is absorbed from the surroundings. 16. 2 understand the three mechanisms of heat transfer. Ignition temperature: minimum temperature at which a fuel spontaneously ignites. Physical state of fuel - fuel achieves a reaction rate with oxygen sufficient to produce a flame only when it is in the gaseous state.
