What Are the Physical Changes of Matter? Understanding States and Reversibility
Learn about physical changes of matter, including melting, freezing, evaporation, and condensation, and how these changes are reversible.
Video transcript
Physical changes of matter involve changes in the state or appearance of a substance without altering its chemical composition. Common examples include melting, where a solid turns into a liquid; freezing, where a liquid becomes solid; evaporation, changing from liquid to gas; and condensation, where a gas turns into a liquid. These changes are generally reversible.
Questions and answers
What is a physical change in matter?
A physical change in matter involves a change in the state or appearance of a substance without altering its chemical composition.
Are physical changes reversible?
Most physical changes, such as melting, freezing, evaporation, and condensation, are generally reversible.
How does melting differ from evaporation?
Melting is the change from a solid to a liquid state, while evaporation is the change from a liquid to a gas.
Can physical changes alter the chemical properties of a substance?
No, physical changes do not alter the chemical properties or composition of a substance.
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