state change
Definition
- Noun:
- A physical transformation: A "state change" is a physical process where matter transitions between its fundamental states—solid, liquid, or gas—without any alteration to its chemical identity or composition.
Usage
- The term "state change" is used to describe physical phenomena in science, particularly in physics and chemistry. It focuses on the rearrangement of molecules and the energy (heat) absorbed or released during the transition, while the substance's chemical formula remains unchanged.
Examples
- Noun:
- The melting of ice is a classic example of a state change from solid to liquid.
- Boiling water involves a state change as the liquid becomes a gas (water vapor).
- Scientists study the energy required for a state change to occur.
Advanced Usage
- "Undergo a state change": to experience a physical phase transition.
- When heated, the substance will undergo a state change.
Variants and Related Words
- Phase change (n): A synonym often used interchangeably with "state change."
- The terms 'phase change' and 'state change' refer to the same physical process.
- Change of state (n): An alternative phrasing with identical meaning.
Synonyms
- Phase transition: A change from one state of matter to another.
- Physical change: A broader term for a change affecting the form of a substance but not its chemical structure.
Noun
-
a change from one state (solid or liquid or gas) to another without a change in chemical composition
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