= Gibbs energy of activation
{c}
{title2=$\Delta G^{\ddagger\circ}$}
= Gibbs energies of activation
{c}
{synonym}
= Activation free energy
{synonym}
The <Gibbs energy of activation> is the standard molar <Gibbs free energy> change associated with going from the starting <reactants> to the <transition state> in <transition state theory>. It specifies the directional barrier, rather than the overall endpoint change in <Gibbs free energy>. Use consistent <standard states> when comparing <Gibbs energies of activation> and <rate constants>. See the https://goldbook.iupac.org/terms/view/G02631[IUPAC Gold Book: Gibbs energy of activation].
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