+A potential energy surface (PES) is a landscape charting a molecule's [Energy](/wiki/energy) against the positions of its atoms. It reveals the pathways of chemical reactions, guiding how systems move from one [State](/wiki/state) to another.
+## See also
+- [Reaction](/wiki/reaction)
+- [Molecule](/wiki/molecule)
+- [Transition State](/wiki/transition_state)
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