## Increasing or decreasing the rate constant

$aR \to bP, Rate = -\frac{1}{a} \frac{d[R]}{dt} = \frac{1}{b}\frac{d[P]}{dt}$

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

### Increasing or decreasing the rate constant

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

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

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

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.