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Soot
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: Many [[particle]]s of [[soot]] build up to form a layer of black powder.
: During the industrial revolution soot built up on [[tree]]s which caused the white moths to be visible to predators. After a few years [[Evolution by Natural Selection|natural selection]] had killed off all the white moths while a [[mutation]] caused some moths to be black, allowing them to survive.
: [[Soot]] is often made in the following [[Incomplete Combustion|incomplete combustion]] [[Chemical Reaction|reactions]]:
: [[Methane]] + [[Oxygen]] → [[Soot]] + [[Water]]
: <chem>CH4 + O2 -> C + 2H2O</chem>
: [[Ethane]] + [[Oxygen]] → [[Soot]] + [[Water]]
: <chem>2C2H6 + 3O2 -> 4C + 6H2O</chem>
: [[Ethane]] + [[Oxygen]] → [[Soot]] + [[Carbon Monoxide]] + [[Water]]
: <chem>2C2H6 + 4O2 -> 2C + 2CO + 6H2O</chem>
: [[Ethene]] + [[Oxygen]] → [[Soot]] + [[Water]]
: <chem>C2H4 + O2 -> 2C + 2H2O</chem>
: [[Ethene]] + [[Oxygen]] → [[Soot]] + [[Carbon Monoxide]] + [[Water]]
: <chem>2C2H4 + 3O2 -> 2C + 2CO + 4H2O</chem>
: [[Methanol]] + [[Oxygen]] → [[Soot]] + [[Water]]
: <chem>2CH3OH + O2 -> 2C + 4H2O</chem>
: [[Ethanol]] + [[Oxygen]] → [[Soot]] + [[Water]]
: <chem>C2H5OH + O2 -> 2C + 3H2O</chem>
: [[Ethanol]] + [[Oxygen]] → [[Soot]] + [[Carbon Monoxide]] + [[Water]]
: <chem>2C2H5OH + 3O2 -> 2C + 2CO + 6H2O</chem>