Is Cooking a Chemical Change?

Chemical changes are changes in the molecular structure of a substance. Usually in a Chemical Change, a new substance is formed. There are a few indicators that tell you that a chemical change has happened:

  1. Gas is produced (bubbles seen)
  2. Light is produced
  3. Change in color
  4. Change is temperature
  5. Precipitate formed (leftover substance)

Look for these pointers when you are deciding if a chemical change has happened. There is actually a way to remember if a Chemical Change has occurred.

Cooking is a chemical change because the object actually changes. When you roast, heat, or cook something, the molecular compounds or makeup of the food changes. When you bake a cake, it changes color, produces gas through fermentation, and is a change in temperature. It is not reversible.