Activation Energy and the Activated Complex (Grade 11 NSC Matric Physical Sciences): Flashcards

Min energy needed to start a chemical reaction

Temporary high-energy state at peak of energy curve

Show how potential energy changes during a reaction

Yes, all reactions need activation energy to start

$E_{activated complex} - E_{reactants}$

$E_{products} - E_{reactants}$

Exothermic reaction (releases energy)

Endothermic reaction (absorbs energy)

At highest energy point; bonds breaking and forming

Always positive (energy must be supplied)