Explain the difference between physical and chemical changes.
Understand the Problem
The question is asking for a comparison between physical changes and chemical changes. It seeks an explanation of the distinctions between these two types of changes in matter, focusing on their characteristics and examples.
Answer
In a physical change, the matter’s appearance or form changes but its composition stays the same. In a chemical change, the composition of the matter changes, resulting in new substances.
The main difference between physical and chemical changes is that in a physical change, the form or appearance of the matter changes but its composition remains the same, whereas in a chemical change, the composition of the matter changes, resulting in the formation of one or more different substances.
Answer for screen readers
The main difference between physical and chemical changes is that in a physical change, the form or appearance of the matter changes but its composition remains the same, whereas in a chemical change, the composition of the matter changes, resulting in the formation of one or more different substances.
More Information
An interesting fact is that some physical changes, such as melting, freezing, and dissolving, can be easily reversed, while chemical changes often require different conditions or new reactions to reverse them.
Tips
A common mistake is to assume that all visible changes, like color or state, indicate a chemical change. Remember, physical changes can also alter appearance without creating a new substance.
Sources
- Difference Between Physical And Chemical Change With Examples - byjus.com
- Chemical Change vs. Physical Change - Chemistry LibreTexts - chem.libretexts.org
- Changes in Matter: Physical vs. Chemical Changes - education.nationalgeographic.org
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