ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY
Iron reacting with sulphur in a test tube. This is an addition reaction that produces iron sulphide. The equation for this reaction is: Fe + S ---> FeS The mixture of iron (Fe) and sulphur (S) must be heated to melt the sulphur and initiate the reaction. Once the reaction has started it generates its own heat (an exothermic reaction), and glows red hot.
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