what are 15 examples of physical and chemical change?
Answers
Answer:
A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity.
Examples of chemical changes are burning, cooking, rusting, and rotting.
Examples of physical changes are boiling, melting, freezing, and shredding.
Often, physical changes can be undone, if energy is input. The only way to reverse a chemical change is via another chemical reaction.
Examples of Chemical Changes
A new compound (product) results from a chemical change as the atoms rearrange themselves to form new chemical bonds.
Burning wood
Souring milk
Mixing acid and base
Digesting food
Cooking an egg
Heating sugar to form caramel
Baking a cake
Rusting of iron
Examples of Physical Changes
No new chemical species forms in a physical change. Changing the state of a pure substance between solid, liquid, and gas phases of matter are all physical changes since the identity of the matter does not change.
Crumpling a sheet of aluminum foil
Melting an ice cube
Casting silver in a mold
Breaking a bottle
Boiling water
Evaporating alcohol
Shredding paper
Sublimation of dry ice into carbon dioxide vapo
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