Wikipedia:POTD row/April 13, 2006
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The activation energy in chemistry and biology is the threshold energy, or the energy that must be overcome in order for a chemical reaction to occur. Activation energy may otherwise be denoted as the minimum energy necessary for a specific chemical reaction to occur. The sparks generated by striking steel against flint provide the activation energy to initiate combustion in this bunsen burner. The blue flame will sustain itself after the sparks are extinguished because the continued combustion of the flame is now energetically favorable. Photo credit: Debivort |