Activation Energy

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Daniela Contreras 3E
Posts: 22
Joined: Fri Sep 25, 2015 3:00 am

Activation Energy

Postby Daniela Contreras 3E » Sat Feb 20, 2016 6:18 pm

So this might go back a couple of lessons but if on a Gibbs graph the products are lower than the reactants BUT there is a large activation energy what does this mean ?

Aleck Sun 1J
Posts: 46
Joined: Fri Sep 25, 2015 3:00 am

Re: Activation Energy

Postby Aleck Sun 1J » Sat Feb 20, 2016 11:34 pm

Based on the graph, I think it means that you need a lot of free energy added to the reactants to get the reaction started, but once it reaches the peak of the graph (achieves activation energy), it releases a lot of energy, more than what it started out with in the first place (to get the products' free energy below the reactants). This indicates that it is an exergonic reaction.

005384106
Posts: 101
Joined: Sat Aug 24, 2019 12:16 am

Re: Activation Energy

Postby 005384106 » Wed Mar 11, 2020 5:30 pm

Alternatively, when the products are at a higher point than the reactants then it is an exergonic reaction, but a large activation energy will mean that the reaction might be slower because the reaction requires more energy for the reaction to take place.

AlyshaP_2B
Posts: 112
Joined: Wed Sep 18, 2019 12:19 am

Re: Activation Energy

Postby AlyshaP_2B » Wed Mar 11, 2020 6:18 pm

Activation energy is the amount of energy needed for a specific reaction to occur. When energy input is needed, the reaction is endergonic, and when energy is released, the reaction is exergonic.

Kallista McCarty 1C
Posts: 212
Joined: Wed Sep 18, 2019 12:18 am

Re: Activation Energy

Postby Kallista McCarty 1C » Wed Mar 11, 2020 9:11 pm

Activation energy is the minimum amount of energy needed for a reaction to take place

Micah3J
Posts: 100
Joined: Tue Oct 08, 2019 12:16 am

Re: Activation Energy

Postby Micah3J » Wed Mar 11, 2020 9:50 pm

How exactly does a catalyst lower the activation energy of a reaction?

Brooke Yasuda 2J
Posts: 102
Joined: Sat Jul 20, 2019 12:17 am

Re: Activation Energy

Postby Brooke Yasuda 2J » Wed Mar 11, 2020 9:51 pm

A catalyst weakens the bonds of the species, ensuring that less energy is required to obtain the necessary activation barrier energy. This is how the reaction rates of the forward and reverse reactions are increased.

vibha gurunathan 1h
Posts: 51
Joined: Mon Oct 07, 2019 12:15 am

Re: Activation Energy

Postby vibha gurunathan 1h » Wed Mar 11, 2020 9:53 pm

Catalysts create an alternate pathway - they speed up reactions by lowering Ea.


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