entropy of activation

entropy of activation

[′en·trə·pē əv‚ak·tə′vā·shən]
(physical chemistry)
The difference in entropy between the activated complex in a chemical reaction and the reactants.
References in periodicals archive ?
The entropy of activation values in the absence and presence of inhibitor are negative.
Enthalpy and entropy of activation decreased, while the Gibbs free energy increased with increased temperatures for the range shown in Table 5.
Whereas the negative values for entropy of activation indicate that the activation complex has a more ordered or more rigid structure than the reactants and the reaction is slower than the normal(17).