Practice Quiz winter 2015

Arrhenius Equation:

Moderators: Chem_Mod, Chem_Admin

Jacqueline Lee
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

Practice Quiz winter 2015

Postby Jacqueline Lee » Fri Feb 12, 2016 8:25 pm

The question goes "The rate constant for reaction A B is 25min-1 at 298K and 35min-1 at 350K. Calculate the Value of the rate constant at 770K. Give your anser in min-1."

How would one approach the question?
I tried treating the given numbers as one finds slope, but the answer I got was 148min-1.

Because there was temperature given I assume I am supposed to be using the Arrhenius equation. Is this correct? How would I proceed from here when I do not have A or EA?

Thanks in advance :)

Saitiel1
Posts: 9
Joined: Fri Sep 25, 2015 3:00 am

Re: Practice Quiz winter 2015

Postby Saitiel1 » Fri Feb 12, 2016 9:32 pm

Hi,

To solve this question you're going to need to use the following equation:. We first need to find Activation energy(Ea) so we change the equation to . You plug in the values given to you in the question to find Ea. Once you find Ea, you plug your values into . This should give you the final rate constant.

Hope this helps!


Return to “Arrhenius Equation, Activation Energies, Catalysts”

Who is online

Users browsing this forum: No registered users and 3 guests