Definitions for activation energy
ac·ti·va·tion en·er·gy

Princeton's WordNetRate this definition:1.0 / 1 vote

1. activation energy, energy of activationnoun

   the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur

   "catalysts are said to reduce the energy of activation during the transition phase of a reaction"

WiktionaryRate this definition:0.0 / 0 votes

1. activation energynoun

   The energy required to initiate a reaction. For example, the flame from the fuse of a firecracker provides a small initial amount of energy, after which the explosive reaction proceeds by itself, releasing a considerably larger quantity of energy. A small push given to a stable but top-heavy object may cause it to fall over; the potential energy released during the fall was present in the system all along but could not be realized as long as the object was upright and balanced.

WikipediaRate this definition:0.0 / 0 votes

1. Activation energy

   In chemistry and physics, activation energy is the minimum amount of energy that must be provided for compounds to result in a chemical reaction. The activation energy (Ea) of a reaction is measured in joules per mole (J/mol), kilojoules per mole (kJ/mol) or kilocalories per mole (kcal/mol). Activation energy can be thought of as the magnitude of the potential barrier (sometimes called the energy barrier) separating minima of the potential energy surface pertaining to the initial and final thermodynamic state. For a chemical reaction to proceed at a reasonable rate, the temperature of the system should be high enough such that there exists an appreciable number of molecules with translational energy equal to or greater than the activation energy. The term "activation energy" was introduced in 1889 by the Swedish scientist Svante Arrhenius.

ChatGPTRate this definition:0.0 / 0 votes

1. activation energy

   Activation energy is the minimum amount of energy required to initiate a chemical reaction. It represents the energy barrier that molecules must overcome in order to form new compounds or rearrange atoms to go from reactants to products. High activation energy generally corresponds to slow or unfavorable reactions, while low activation energy corresponds to faster or favorable reactions.

WikidataRate this definition:0.0 / 0 votes

1. Activation energy

   In chemistry, activation energy is a term introduced in 1889 by the Swedish scientist Svante Arrhenius that is defined as the minimum energy that must be input to a chemical system, containing potential reactants, in order for a chemical reaction to occur. Activation energy may also be defined as the minimum energy required to start a chemical reaction. The activation energy of a reaction is usually denoted by Ea and given in units of kilojoules per mole. Activation energy can be thought of as the height of the potential barrier separating two minima of potential energy. For a chemical reaction to proceed at a reasonable rate, there should exist an appreciable number of molecules with energy equal to or greater than the activation energy. At a more advanced level, the Arrhenius Activation energy term from the Arrhenius equation is best regarded as an experimentally determined parameter that indicates the sensitivity of the reaction rate to temperature. There are two objections to associating this activation energy with the threshold barrier for an elementary reaction. First, it is often unclear as to whether or not reaction does proceed in one step; threshold barriers that are averaged out over all elementary steps have little theoretical value. Second, even if the reaction being studied is elementary, a spectrum of individual collisions contributes to rate constants obtained from bulk experiments involving billions of molecules, with many different reactant collision geometries and angles, different translational and vibrational energies - all of which may lead to different microscopic reaction rates.

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1. • Energy

How to pronounce activation energy?

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Numerology

1. Chaldean Numerology

   The numerical value of activation energy in Chaldean Numerology is: 9

2. Pythagorean Numerology

   The numerical value of activation energy in Pythagorean Numerology is: 8

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=activation energy
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Activation_Energy
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Activation_Energy
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=activation energy