Chemical Vs Physical

a: Chemical change ~
b: rust

What: The rusting of iron is a chemical change. It is the reaction of atmospheric O2 with metallic iron(Fe++). There is a physical changed caused by this reaction in that the iron changes color and material is not as strong as it once was. If iron is heated to to that point that it melts and goes from a sold to a liquid, without oxidation, that is a physical change.

Writer: Not Stated
Where: Reference Link Has Evaporated
Date: Jul 24 2013 7:15 PM

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