Where do we find the values for A?

Arrhenius Equation:

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RRahimtoola1I
Posts: 102
Joined: Fri Aug 09, 2019 12:15 am

Where do we find the values for A?

Postby RRahimtoola1I » Sat Mar 07, 2020 11:24 pm

Are the values for A given to us somewhere or is there a way to calculate them?

DLee_1L
Posts: 103
Joined: Sat Aug 17, 2019 12:17 am

Re: Where do we find the values for A?

Postby DLee_1L » Sun Mar 08, 2020 3:12 am

A is usually a constant that refers to the frequency of correct orientation collisions there are. However, if you have the equilibrium constant, activation energy, and temperature, you will be able to calculate the A via the Arrhenius equation.

Viviana Velasquez
Posts: 97
Joined: Sat Jul 20, 2019 12:15 am

Re: Where do we find the values for A?

Postby Viviana Velasquez » Sun Mar 08, 2020 5:00 pm

If you are solving for something besides A, it will be given to you since the constant differs with each equation.

Andres Merlos 2L
Posts: 46
Joined: Wed Sep 18, 2019 12:17 am

Re: Where do we find the values for A?

Postby Andres Merlos 2L » Sun Mar 08, 2020 9:03 pm

It's pretty much like finding a missing variable for any standard equation. As long as you have the temperature, activation energy, gas constant, and gas constant, you can solve for A. A is the frequency of collisions.

Hannah Pham
Posts: 104
Joined: Fri Aug 09, 2019 12:17 am

Re: Where do we find the values for A?

Postby Hannah Pham » Sun Mar 08, 2020 9:08 pm

A is the frequency of collisions. You can calculate A using the Arrhenius equation given the other variables, including temperature, activation energy, and equilibrium constant.

rohun2H
Posts: 100
Joined: Wed Sep 18, 2019 12:19 am

Re: Where do we find the values for A?

Postby rohun2H » Sun Mar 08, 2020 11:35 pm

Arrhenius equation can be used to determine A if not given.


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