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<p>[QUOTE=&quot;Kentucky, post: 1422037, member: 33176&quot;]Heating a coin can be done in more than one way.&nbsp; Being heated directly in a flame makes it hard to control the exact temperature and it is exposed to the unreacted fuel in the flame.&nbsp; There is an experiment in chemistry that many have referenced here, &quot;The Gold Penny&quot; where a penny (ehem...cent coin) is given a thin coating of zinc and then heated to make a thin coating of brass.&nbsp; Done correctly this is spectacular (if anyone has some good examples, post them).&nbsp; It is hard to control the heating phase however if you use a bunsen burner or other type of flame.&nbsp; An alternative is to place the cent on a hotplate and remove it when the color change occurs.&nbsp; This would be interesting to experiment with.[/QUOTE]</p><p><br /></p>

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