Activation Energy

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AditiSax
Posts: 31
Joined: Fri Sep 28, 2018 12:20 am

Activation Energy

Postby AditiSax » Sun Mar 10, 2019 9:52 pm

How can we define activation energy and represent it using energy profile diagrams?

Yousif Jafar 1G
Posts: 59
Joined: Thu May 10, 2018 3:00 am

Re: Activation Energy

Postby Yousif Jafar 1G » Sun Mar 10, 2019 9:59 pm

Activation energy is the minimum quantity of energy which the reacting species must possess in order to undergo a specified reaction to reach the products and this can be shown in an energy profile diagram by showing the energy of the reactants, the energy needed to overcome the Activation energy, and the final energy of the products.

Valeria Viera 1B
Posts: 60
Joined: Fri Apr 06, 2018 11:05 am

Re: Activation Energy

Postby Valeria Viera 1B » Sun Mar 10, 2019 10:03 pm

Activation energy is the energy needed for a reaction to happen (for reactants to turn into products or vice versa)
You can show this using graphs by drawing a little hump (if you google activation energy exothermic / endothermic they’ll have all the graphs showing this)
If the hump goes from higher reactants to lower product energy, then the reaction is exothermic and the activation energies can be shown from the reactants line to the peak of the hump .

Aili Ye 4L
Posts: 58
Joined: Fri Sep 28, 2018 12:16 am

Re: Activation Energy

Postby Aili Ye 4L » Sun Mar 10, 2019 10:06 pm

Activation energy is the energy needed to turn reactants into products. It is the energy difference between the energy of the reactants and the highest peak of the energy graph.

Athena L 1B
Posts: 59
Joined: Fri Sep 28, 2018 12:18 am

Re: Activation Energy

Postby Athena L 1B » Thu Mar 14, 2019 11:58 am

The hill - looking thing that comes after the reactants in energy diagrams represents the activation energy

Rhea Churi 4K
Posts: 62
Joined: Fri Sep 28, 2018 12:28 am

Re: Activation Energy

Postby Rhea Churi 4K » Thu Mar 14, 2019 12:31 pm

Activation energy is the energy required to cause a reaction to happen. It is represented by the highest peak on an energy graph.

Jacqueline Duong 1H
Posts: 61
Joined: Fri Sep 28, 2018 12:28 am

Re: Activation Energy

Postby Jacqueline Duong 1H » Sun Mar 17, 2019 3:50 am

Activation energy is the minimum amount of energy required for a certain reaction to occur. In an energy profile diagram, it would be the peak of the graph.

KHuang1L
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

Re: Activation Energy

Postby KHuang1L » Sun Mar 17, 2019 4:29 pm

Activation energy is the amount of energy required for reactant particles to collide. It is represented as the amount of energy between the transition state point and reactant or intermediate step.

Emily Burghart 1k
Posts: 50
Joined: Wed Sep 18, 2019 12:17 am

Re: Activation Energy

Postby Emily Burghart 1k » Tue Feb 18, 2020 10:01 pm

The activation energy of a reaction is the peak of an energy diagram. Beginning where the products are located to the height of the peak is how much energy is needed to cause the reaction to happen.

Some reactions have very low activation energies, and others have high activation energies. It is important to note that the height of the activation energy affects the reaction rate. When you have a lower activation energy the reaction has a higher reaction rate while the opposite is true as well.

Michelle Xie 2B
Posts: 99
Joined: Sat Aug 17, 2019 12:18 am

Re: Activation Energy

Postby Michelle Xie 2B » Thu Feb 27, 2020 4:17 pm

Activation energy is the energy needed to a reaction to occur.

Viviana Velasquez
Posts: 97
Joined: Sat Jul 20, 2019 12:15 am

Re: Activation Energy

Postby Viviana Velasquez » Thu Feb 27, 2020 6:39 pm

The activation energy is the amount of energy needed for the reaction to occur (reactants form products)

CameronDis2K
Posts: 51
Joined: Wed Feb 20, 2019 12:18 am

Re: Activation Energy

Postby CameronDis2K » Fri Feb 28, 2020 11:18 am

Activation energy simply put is the minimum amount of energy that is required to be inputted into a reaction to move the reaction forward. In the graph/diagram of energy vs. reaction process, the 'hump' in the graph represents the activation energy.

Ying Yan 1F
Posts: 101
Joined: Fri Aug 02, 2019 12:16 am

Re: Activation Energy

Postby Ying Yan 1F » Fri Feb 28, 2020 3:31 pm

Activation energy can also be regarded as the "threshold energy" of a reaction, as it is the amount of energy needed for a reaction to actually occur. Hope that helps!

Catherine Daye 1L
Posts: 104
Joined: Wed Sep 11, 2019 12:16 am

Re: Activation Energy

Postby Catherine Daye 1L » Sat Feb 29, 2020 10:14 am

Activation energy is the minimum amount of energy required to induce a reaction. On a diagram, it is the distance between the energy of the reactants and peak of the “hump”.

Nicholas_Gladkov_2J
Posts: 125
Joined: Sat Aug 17, 2019 12:17 am

Re: Activation Energy

Postby Nicholas_Gladkov_2J » Sat Feb 29, 2020 9:24 pm

AditiSax wrote:How can we define activation energy and represent it using energy profile diagrams?


Regarding the activation energy, this is why although the process if favored for diamond to become graphite, there is a large energy barrier (it is kinetically trapped).

Jasmine W 1K
Posts: 49
Joined: Sat Sep 07, 2019 12:18 am

Re: Activation Energy

Postby Jasmine W 1K » Sun Mar 01, 2020 5:05 pm

Activation energy is the minimum amount of energy required to begin the reaction. In an energy diagram, it is the highest peak on the energy graph.

Andres Merlos 2L
Posts: 46
Joined: Wed Sep 18, 2019 12:17 am

Re: Activation Energy

Postby Andres Merlos 2L » Sun Mar 01, 2020 5:17 pm

Activation energy is the amount of energy needed to turn reactants to products. This is depicted on a diagram with the highest hump.


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