Increasing or decreasing the rate constant


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Ashley Ko 3I
Posts: 114
Joined: Wed Sep 30, 2020 9:54 pm

Increasing or decreasing the rate constant

Postby Ashley Ko 3I » Sat Mar 06, 2021 2:01 pm

Does adding a catalyst increase or decrease the rate constant? Does increasing the temperature always increase the rate constant? Why does temperature and catalysts increase/decrease the rate constant?

Neel Bonthala 2G
Posts: 104
Joined: Wed Sep 30, 2020 9:40 pm

Re: Increasing or decreasing the rate constant

Postby Neel Bonthala 2G » Sat Mar 06, 2021 2:06 pm

Adding a catalyst should increase the rate constant, but according to the Arrhenius equation, decreasing the activation energy should increase k. Using similar logic, increasing temperature increases k according to the equation. Thus, the rate of the reaction should increase.

Nico Medina
Posts: 89
Joined: Wed Sep 30, 2020 9:33 pm

Re: Increasing or decreasing the rate constant

Postby Nico Medina » Tue Mar 16, 2021 5:11 am

I was wondering this too, thanks for the help!

Keshav Patel 14B 2B
Posts: 104
Joined: Wed Sep 30, 2020 9:40 pm

Re: Increasing or decreasing the rate constant

Postby Keshav Patel 14B 2B » Tue Mar 16, 2021 10:49 am

A reaction without a catalyst would have a smaller rate constant for sure but with a catalyst it’s important to distinguish that this new reaction takes an entirely different path. Furthermore, yes temperature increase does increase K.


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