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Sagot :
Final answer:
Physical and chemical changes are distinguishable in chemistry based on whether new substances are formed or if it's a change of state or appearance.
Explanation:
Chemical Change:
- A solid melts: Physical change, as the state changes from solid to liquid with no new substances formed.
- Sugar dissolves in water: Chemical change, as the sugar molecules disperse in water to form new chemical entities.
- A solid sublimes: Physical change, as the solid directly transitions to a gas without forming new substances.
Learn more about Physical and chemical changes here:
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