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16 April, 13:38

A large white and gray log that smells like pine is burned in a fire pit. After being completely burned, all that remains of the log is a small pile of soft white-gray ashes that no longer smell of pine. Describe the evidence that a chemical change has occurred.

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  1. 16 April, 13:43
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    A chemical change has occurred because the wood has turned into a substance that can't be changed back to it's original form. The wood has turned to ash, chemical changes are non reversible.
  2. 16 April, 13:52
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    Answer:While the pile of ashes and log have similar colors, the change in size, odor, and hardness, and the difference in combustibility indicate that a chemical change has resulted in a substance with a different identity. Furthermore, the ashes cannot be converted back into a log.
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