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Physical Properties Sources Index (PPSI)

Activation Energy

Activation Energy (Chemical Kinetics)
Definition:Potential energy which is needed so that a reaction happens: Ea = d ln k R T2/dT, where k is the rate constant, R the gas constant and T the thermodynamic temperature. Ea corresponds to the difference between the energies of the transition state and the educts.
Units:J mol-1
Symbol:Ea
EA
Q
Synonyms:Arrhenius Activation Energy
Translation: DEAktivierungsenergie
FREnergie d'activation

Sources

TitleAuthor(s)MediumLocationRankSorted ascendingQualityRatingQuantitySource typeSystems
ReaxysOnlineOnline
(Subscription)
13
3.4
Ca. 14’000 reactions/Ca. 14’500 compoundsData (measured)Organic Compounds
NIST Chemical Kinetics Database on the WebOnlineOnline
(Free)
11
2.8
Data (measured)
NIST Chemical Kinetics Database on the WebOnlineOnline
(Free)
11
2.6
Data (calculated)
Physikalisch-chemische DatenLechner M.D. (Ed.)Print303 C22
1.9
Data (measured)Gases
CRC Handbook of Chemistry and PhysicsLide D.R.OnlineOnline
(Subscription)
22
3.1
Data (measured)
Polymer HandbookBrandrup J. ; Immergut E.H. (Eds.)Print369 E22
3.4
Data (measured)Polymers
Evaluated Kinetic Data for High Temperature Reactions Vol. 4 Homogeneous Gas Phase Reactions of Halogen- and Cyanide- Containing SpeciesBaulch D.L. ; Duxbury J. ; Grant S.J. ; Montague D.C. Print589 C21
3.3
Data (measured)
Gas-Phase Tropospheric Chemistry of Organic Compounds, Vol. 2Atkinson Roger (Ed.)Print589 C21
3
Data (measured)
Landolt-Börnstein: New Series = Neue Serie Gruppe 2 Vol. 13a: Radical Reaction Rates in LiquidsOnlineOnline
(Subscription)
21
4
Data (measured)Organic Compounds
Landolt-Börnstein: New Series = Neue Serie Gruppe 2 Vol. 18 a: Radical Reaction Rates in LiquidsOnlineOnline
(Subscription)
21
4
Data (measured)Organic Compounds Liquids
Landolt-Börnstein: New Series = Neue Serie Gruppe 2 Vol. 18b: Radical Reaction Rates in LiquidsOnlineOnline
(Subscription)
21
4
Data (measured)Organic Compounds Liquids
Landolt-Börnstein: New Series = Neue Serie Gruppe 2 Vol. 18c: Radical Reaction Rates in LiquidsOnlineOnline
(Subscription)
21
4
Data (measured)Organic Compounds Liquids
Landolt-Börnstein: New Series = Neue Serie Gruppe 2 Vol. 18 D1: Radical Reaction Rates in LiquidsOnlineOnline
(Subscription)
21
4
Data (measured)Organic Compounds Liquids
Landolt-Börnstein: New Series = Neue Serie Gruppe 2 Vol. 18 D2: Radical Reaction Rates in LiquidsOnlineOnline
(Subscription)
21
4
Data (measured)Organic Compounds Liquids
Landolt-Börnstein: New Series = Neue Serie Gruppe 2 Vol. 18 E1: Radical Reaction Rates in LiquidsOnlineOnline
(Subscription)
21
4
Data (measured)Organic Compounds Liquids
Landolt-Börnstein: New Series = Neue Serie Gruppe 2 Vol. 18 E2: Radical Reaction Rates in LiquidsOnlineOnline
(Subscription)
21
4
Data (measured)Organic Compounds Liquids
Landolt-Börnstein: New Series = Neue Serie Gruppe 2 Vol. 13b: Radical Reaction Rates in LiquidsOnlineOnline
(Subscription)
21
4
Data (measured)Organic Compounds
Landolt-Börnstein: New Series = Neue Serie Gruppe 2 Vol. 13c: Radical Reaction Rates in LiquidsOnlineOnline
(Subscription)
21
3.7
Data (measured)Organic Compounds
Landolt-Börnstein: New Series = Neue Serie Gruppe 2 Vol. 13d: Radical Reaction Rates in LiquidsOnlineOnline
(Subscription)
21
4
Data (measured)Organic Compounds
Landolt-Börnstein: New Series = Neue Serie Gruppe 2 Vol. 13e: Radical Reaction Rates in LiquidsOnlineOnline
(Subscription)
21
4
Data (measured)Organic Compounds
Landolt-Börnstein: 6. Aufl. Gruppe 2 Vol. 5 Part b: Transportphänomene 2 = Transport Phenomena 2Schäfer Klaus (Ed.)Print8 B22
3.5
Data (measured)Gases
GRI-MechOnlineOnline
(Free)
22
3.5
Data (measured)
Detherm Thermophysical Properties of Pure Substances & MixturesOnlineOnline
(Pay per use)
32
2.5
Data (measured)
Liquid-phase reaction rate constantsDenisov E. T.PrintNEBIS33
2
Data (measured)
IUPAC Gold BookOnlineOnline
(Free)
102
2.7
Definition

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