Chemistry / Chem 0627 · Atom · ~20 seconds
Law of Conservation of Energy
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State
During a chemical or physical change, energy changes from one form into another but is never created or destroyed overall.
Show
Gasoline's stored chemical potential energy converts into the kinetic energy of a car's moving pistons, not into additional energy overall.
Watch for
A reaction that seems to produce energy "from nothing" is converting some unmeasured input form; it never actually breaks this law.