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Imagine sitting in front of a campfire. A smoky scent wafts through the air as a pot of soup simmers over the open flame. While you stare at the flickering orange tongues, you might wonder: Why are the wood logs on fire, but the metal pot isn’t?

The reason why some things catch fire and other things don’t comes down to their chemical bonds and the energy it would take to change or break those bonds. 

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