+**State change** refers to a fundamental shift in the condition or form of a thing. It marks a transition, moving from one defined existence to another, often observed as a [Phase Transition](/wiki/phase_transition) in matter or a new condition within a [System](/wiki/system).
+## See also
+- [Equilibrium](/wiki/equilibrium)
+- [Transformation](/wiki/transformation)
+- [Process](/wiki/process)
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