Activation energy  [ENDORSED]

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J_Rodriguez_Dis2k
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Joined: Fri Sep 25, 2015 3:00 am

Activation energy

Postby J_Rodriguez_Dis2k » Sat Mar 04, 2017 7:25 pm

Can someone please explain to me how the activation energy is also known as the Gibbs free energy of activation ?

Navi Sidhu 1F
Posts: 25
Joined: Wed Sep 21, 2016 2:59 pm

Re: Activation energy  [ENDORSED]

Postby Navi Sidhu 1F » Sat Mar 04, 2017 8:52 pm

The minimum energy requirement that must be met for a chemical reaction to occur is called the activation energy, Ea. The activation energy (Ea), labeled ΔG‡ is the energy difference between the reactants and the activated complex, also known as transition state. In a chemical reaction, the transition state is defined as the highest-energy state of the system. If the molecules in the reactants collide with enough kinetic energy and this energy is higher than the transition state energy, then the reaction occurs and products form.

If you look at this figure, that might help: Image

You can see the rise in Gibbs Free energy at the transitional state.

Info from: https://chem.libretexts.org/Core/Physical_and_Theoretical_Chemistry/Kinetics/Modeling_Reaction_Kinetics/Temperature_Dependence_of_Reaction_Rates/The_Arrhenius_Law/The_Arrhenius_Law%3A_Activation_Energies


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