Other examples include burning of a candle rusting of iron baking a cake etc. A chemical change is said to have occurred when new substances are formed. For example if wood is burned in a fireplace there is not wood anymore but ash.
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Describe the energy transformations that occur when a piece of wood is
A chemical change occurs when a piece of wood?
Hence, in a chemical change, one substance is converted into another.
Burning of wood is a chemical change as new substances which cannot be changed back (e.g.
