Activation Energy

Arrhenius Equation:

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Silvino Jimenez 1A
Posts: 52
Joined: Fri Sep 29, 2017 7:04 am

Activation Energy

Postby Silvino Jimenez 1A » Fri Mar 16, 2018 6:01 pm

When given a graph interpretation of a reaction, why does activation energy sometimes change in multi step chemical reaction?

Ishan Saha 1L
Posts: 60
Joined: Fri Sep 29, 2017 7:03 am

Re: Activation Energy

Postby Ishan Saha 1L » Fri Mar 16, 2018 6:08 pm

Every step of the overall reaction has its own unique activation energy so on the graph you will observe different Ea for each step.

Max Mazo 2C
Posts: 30
Joined: Fri Sep 29, 2017 7:06 am

Re: Activation Energy

Postby Max Mazo 2C » Sat Mar 17, 2018 1:26 am

Since the reaction has multiple steps, there will be multiple transition states, which means multiple energy barriers.

melissa carey 1f
Posts: 53
Joined: Fri Sep 29, 2017 7:06 am

Re: Activation Energy

Postby melissa carey 1f » Sat Mar 17, 2018 11:28 am

In the question below, each peak is an activation energy of a step in the reaction. The top of each peak represents an activated complex / transition state.
Attachments
Screen Shot 2018-03-17 at 11.27.00 AM.png

Clarissa Molina 1D
Posts: 55
Joined: Fri Sep 29, 2017 7:04 am

Re: Activation Energy

Postby Clarissa Molina 1D » Sat Mar 17, 2018 1:32 pm

How do you know which step is rate determining by looking at a graph interpretation of a reaction such as the one shown above?

Tim Nguyen 2J
Posts: 31
Joined: Sat Jul 22, 2017 3:00 am

Re: Activation Energy

Postby Tim Nguyen 2J » Sat Mar 17, 2018 4:42 pm

The highest peak should be the slowest step which is the rate determining step


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