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An empirical or model-derived energy scale governing temperature sensitivity; its meaning depends on the rate expression and need not equal one barrier height exactly.
wp-chem-chemical-kineticsopenstax-chemistry-2edoe-catalystsEach relation below ends at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
A catalyst provides an alternative pathway with different activation barriers without changing the equilibrium free-energy difference; the apparent activation energy can depend on mechanism and conditions.
The target represents a state, property, observable, or state-dependent description associated with the source system or theory.
wp-chem-chemical-kineticsopenstax-chemistry-2edoe-catalystsThis is an authored directed relation from the source endpoint to the target endpoint.
Activation energy is an apparent temperature-dependence parameter, whereas a transition-state free-energy barrier includes enthalpic and entropic contributions.
The target represents a state, property, observable, or state-dependent description associated with the source system or theory.
wp-chem-chemical-kineticsopenstax-chemistry-2edoe-catalystsEach relation below starts at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
For Arrhenius behavior, the slope of versus determines an apparent activation energy.
The source supplies a substantive formal ingredient, dynamical sector, law, field content, or mechanism of the target theoretical framework.
wp-chem-chemical-kineticsopenstax-chemistry-2edoe-catalysts