**Recognizing the Difference between Chemical and Physical Changes:
Physical changes:
A change in size, condition, or appearance.
Chemical changes:
include the creation of new chemicals, color shifts, gas production, and the release or absorption of energy.
Reversibility:
Physical changes: Mostly reversible.
Chemical changes: Usually irreversible.
Changes in Energy:
Physical Changes: They don’t always necessitate a change in the system’s internal energy, but they may include energy changes.
Chemical Changes: Include notable energy shifts.
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