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- Enthalpy–entropy_compensation abstract "Enthalpy–entropy compensation is a specific example of the compensation effect. The compensation effect refers to the behavior of a series of closely related chemical reactions (e.g., reactants in different solvents or reactants differing only in a single substituent), which exhibit a linear relationship between one of the following kinetic or thermodynamic parameters for describing the reactions:(i) between the logarithm of the pre-exponential factors (or prefactors) and the activation energies lnAi = α + Ea,i/Rβwhere the series of closely related reactions are indicated by the index i, Ai are the preexponential factors, Ea,i are the activation energies, R is the gas constant, and α and β are constants.(ii) between enthalpies and entropies of activation (enthalpy–entropy compensation) ΔH‡i = α + βΔS‡iwhere H‡i are the enthalpies of activation and S‡i are the entropies of activation.(iii) between the enthalpy and entropy changes of a series of similar reactions (enthalpy–entropy compensation) ΔHi = α + βΔSiwhere Hi are the enthalpy changes and Si are the entropy changes.When the activation energy is varied in the first instance, we may observe a related change in pre-exponential factors. An increase in A tends to compensate for an increase in Ea,i, which is why we call this phenomenon a compensation effect. Similarly, for the second and third instances, in accordance with the Gibbs free energy equation, with which we derive the listed equations, ΔH scales proportionately with ΔS. The enthalpy and entropy compensate for each other because of their opposite algebraic signs in the Gibbs equation.A correlation between enthalpy and entropy has been observed for a wide variety of reactions. The correlation is significant because, for linear free-energy relationships (LFERs) to hold, one of three conditions for the relationship between enthalpy and entropy for a series of reactions must be met, with the most common encountered scenario being that which describes enthalpy–entropy compensation. The empirical relations above were noticed by several investigators beginning in the 1920s, since which the compensatory effects they govern have been identified under different aliases.".
- Enthalpy–entropy_compensation wikiPageID "14708063".
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- Enthalpy–entropy_compensation wikiPageRevisionID "640504709".
- Enthalpy–entropy_compensation wikiPageWikiLink Activation_energy.
- Enthalpy–entropy_compensation wikiPageWikiLink Activation_enthalpy.
- Enthalpy–entropy_compensation wikiPageWikiLink Arrhenius_plot.
- Enthalpy–entropy_compensation wikiPageWikiLink Brønsted_catalysis_equation.
- Enthalpy–entropy_compensation wikiPageWikiLink Category:Chemical_thermodynamics.
- Enthalpy–entropy_compensation wikiPageWikiLink Category:Thermodynamics.
- Enthalpy–entropy_compensation wikiPageWikiLink Chemical_kinetics.
- Enthalpy–entropy_compensation wikiPageWikiLink Conjugate_variables_(thermodynamics).
- Enthalpy–entropy_compensation wikiPageWikiLink Copper_chromite.
- Enthalpy–entropy_compensation wikiPageWikiLink Dehydrogenation.
- Enthalpy–entropy_compensation wikiPageWikiLink Entropy_of_activation.
- Enthalpy–entropy_compensation wikiPageWikiLink Free-energy_relationship.
- Enthalpy–entropy_compensation wikiPageWikiLink Gas_constant.
- Enthalpy–entropy_compensation wikiPageWikiLink Gibbs_free_energy.
- Enthalpy–entropy_compensation wikiPageWikiLink Hammett_equation.
- Enthalpy–entropy_compensation wikiPageWikiLink Indexed_family.
- Enthalpy–entropy_compensation wikiPageWikiLink Linear_free-energy_relationship.
- Enthalpy–entropy_compensation wikiPageWikiLink Nucleophile.
- Enthalpy–entropy_compensation wikiPageWikiLink Pre-exponential_factor.
- Enthalpy–entropy_compensation wikiPageWikiLink Primary_alcohol.
- Enthalpy–entropy_compensation wikiPageWikiLink Primary_alcohols.
- Enthalpy–entropy_compensation wikiPageWikiLink Reaction_quotient.
- Enthalpy–entropy_compensation wikiPageWikiLink Substituent.
- Enthalpy–entropy_compensation wikiPageWikiLink Thermodynamic_parameters.
- Enthalpy–entropy_compensation wikiPageWikiLink Van_t_Hoff_equation.
- Enthalpy–entropy_compensation wikiPageWikiLink Van_t_Hoff_plot.
- Enthalpy–entropy_compensation wikiPageWikiLinkText "Enthalpy–entropy compensation".
- Enthalpy–entropy_compensation hasPhotoCollection Enthalpy–entropy_compensation.
- Enthalpy–entropy_compensation wikiPageUsesTemplate Template:Math.
- Enthalpy–entropy_compensation wikiPageUsesTemplate Template:Reflist.
- Enthalpy–entropy_compensation wikiPageUsesTemplate Template:Use_dmy_dates.
- Enthalpy–entropy_compensation subject Category:Chemical_thermodynamics.
- Enthalpy–entropy_compensation subject Category:Thermodynamics.
- Enthalpy–entropy_compensation comment "Enthalpy–entropy compensation is a specific example of the compensation effect.".
- Enthalpy–entropy_compensation label "Enthalpy–entropy compensation".
- Enthalpy–entropy_compensation sameAs m.0121_nv4.
- Enthalpy–entropy_compensation sameAs Q5380513.
- Enthalpy–entropy_compensation sameAs Q5380513.
- Enthalpy–entropy_compensation wasDerivedFrom Enthalpy–entropy_compensation?oldid=640504709.
- Enthalpy–entropy_compensation isPrimaryTopicOf Enthalpy–entropy_compensation.