Reaction Graphs

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Joyce Gu 1E
Posts: 29
Joined: Tue Nov 24, 2015 3:00 am

Reaction Graphs

Postby Joyce Gu 1E » Sat Mar 17, 2018 5:48 pm

When looking at a reaction graph, how do you determine which reactants have the smallest/greatest rate in the forward/reverse direction?

Virpal Gill 1B
Posts: 32
Joined: Thu Jul 27, 2017 3:00 am

Re: Reaction Graphs

Postby Virpal Gill 1B » Sat Mar 17, 2018 6:04 pm

The greater the activation energy of each step, the slower the rate. So the curves with smaller hills/height (whatever you'd like to call them) have lower activation rates and are therefore faster (have greater rates).

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

Re: Reaction Graphs

Postby Tim Nguyen 2J » Sat Mar 17, 2018 6:24 pm

Higher peaks should indicate a slower rate since it takes more energy to overcome the higher activation energy. Lower peaks are easier to overcome thus indicating a lower activation energy.

Guangyu Li 2J
Posts: 50
Joined: Fri Sep 29, 2017 7:07 am
Been upvoted: 1 time

Re: Reaction Graphs

Postby Guangyu Li 2J » Sun Mar 18, 2018 2:27 am

The greater the activation energy, the longer reactants cost to reach the energy barrier, and the slower the reaction rate. For the endothermic reactions, since products need to overcome a higher energy barrier, the forward reaction is slower than the reverse reaction; For the exothermic reactions, since products need to overcome a lower energy barrier, the reverse reaction is faster than the reverse reaction.

Hope this helps! Good luck in the Final!

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