## catalyst/enzyme

$K = \frac{k_{forward}}{k_{reverse}}$

aaronharouni
Posts: 72
Joined: Fri Sep 28, 2018 12:15 am

### catalyst/enzyme

Why doesn't a catalyst/enzyme change the reaction rate?

Soumya Ravichandran 4H
Posts: 62
Joined: Fri Sep 28, 2018 12:19 am

### Re: catalyst/enzyme

A catalyst/enzyme does change the rate of the reaction by changing the activation energy needed for the reaction to proceed to completion.

Heesu_Kim_1F
Posts: 60
Joined: Fri Sep 28, 2018 12:18 am

### Re: catalyst/enzyme

^I agree. A catalyst/enzyme does change/increases the rate of reaction by lowering the activation energy. However, a catalyst/enzyme does not change the equilibrium constant for a reaction. Also, a catalyst or enzyme (itself) is not changed during a reaction.
Hope this helps!

Diana Bibireata 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:23 am

### Re: catalyst/enzyme

A catalyst lowers the activation energy so it ends up speeding up the rate of the reaction.

Jocelyne Milke 1G
Posts: 73
Joined: Fri Sep 28, 2018 12:25 am

### Re: catalyst/enzyme

A catalyst speeds up the reaction but does not get consumed in the reaction and doesn't change the rate constant.