## A?

Arrhenius Equation: $\ln k = - \frac{E_{a}}{RT} + \ln A$

Rachel Wang
Posts: 49
Joined: Fri Sep 29, 2017 7:04 am

### A?

Does A stay the same even if activation energy or k changes, as long as temperature is the same?

Andrea Grigsby 1I
Posts: 60
Joined: Fri Sep 29, 2017 7:03 am

### Re: A?

yes, it is a constant

704887365
Posts: 49
Joined: Sat Jul 22, 2017 3:00 am

### Re: A?

Yes, A will always stay the same

Rachel N 1I
Posts: 48
Joined: Thu Jul 27, 2017 3:00 am

### Re: A?

So is A affected by temperature or nearly independent of it?

Vincent Chiang 1L
Posts: 54
Joined: Fri Sep 29, 2017 7:05 am

### Re: A?

If T increases, k increases, and if k increases, A increases. This should mean that as T increases, A should increase.

DamianW
Posts: 35
Joined: Fri Sep 29, 2017 7:06 am

### Re: A?

is that why you can subtract them?

Varsha Swamy 2J
Posts: 14
Joined: Sat Jul 22, 2017 3:00 am

### Re: A?

Yep, I think the fact that it is constant (in general) is the reason it can be subtracted out of the equation when combining two Arrhenius equations to predict k1 using k2, T2, and T1.