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NOTE: This is an unformatted excerpt from our online fire protection training library.

Fire Behavior- Introduction to Fire Suppression

Fire Chemistry

Heat of Reaction

In any chemical reaction, heat is either produced or absorbed. In manufacturing some of the materials we use every day, depending on the chemical process, different steps of the operation may be absorbing heat while others may be emitting heat.

If heat is produced and given off by the reaction, the reaction is exothermicExothermic reactions almost always yield a substance much more stable that its components. However, depending on the materials of the reaction, and the chemistry that holds the final material together, the final product can break down, upon the introduction of an outside force, such as heat or pressure, to its original components.. When heat is absorbed, the reaction is endothermicThe curing of concrete is an example of an endothermic reaction. In the chemistry of the concrete hardening, water that is part of the process is released at high temperatures. This is why concrete that is curing is warmer than cured concrete, and why construction engineers sometimes need to gauge how fast the temperature of the concrete is changing.. The field of fire suppression is concerned with combustion reactions, which are exothermic.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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