Arrhenius Equation

Arrhenius Equation:

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005290099
Posts: 24
Joined: Sat Aug 24, 2019 12:16 am

Arrhenius Equation

Postby 005290099 » Thu Mar 12, 2020 6:22 pm

I wasn't in class for the Arrhenius equation part and I was wondering if someone could explain it to me?

MingdaH 3B
Posts: 133
Joined: Thu Jul 11, 2019 12:17 am

Re: Arrhenius Equation

Postby MingdaH 3B » Thu Mar 12, 2020 6:47 pm

The Arrhenius equation basically just relates the rate constant to temperature and the activation energy of the reaction.

Jared_Yuge
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

Re: Arrhenius Equation

Postby Jared_Yuge » Thu Mar 12, 2020 7:10 pm

More specifically the Arrhenius equation can show us the impact of temperature, a catalyst, energy barrier, and frequency and orientation of collisions, which are all not shown in the rate law.

Dina Marchenko 2J
Posts: 54
Joined: Thu Jul 25, 2019 12:16 am

Re: Arrhenius Equation

Postby Dina Marchenko 2J » Fri Mar 13, 2020 3:12 pm

k=A*e^-Ea/RT

This formula helps determine the temperature dependence of reaction rates.
k is the reaction rate of the reaction.
A is a pre-exponential factor and has to do with the collision of the molecule (and if it is properly oriented when it collides in order to react)
Ea is the activation energy, or the energy input needed to activate the reaction
R is the gas constant
T is the temperature in kelvin

Given the information provided for you, you can find any of these unknown variables.

Sidharth D 1E
Posts: 98
Joined: Sat Aug 24, 2019 12:17 am

Re: Arrhenius Equation

Postby Sidharth D 1E » Fri Mar 13, 2020 5:39 pm

To expand on that, reactions that give a straight line when lnkr is plotted against 1/T are said to show Arrhenius behavior

Joowon Seo 3A
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Joined: Sat Aug 24, 2019 12:17 am
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Re: Arrhenius Equation

Postby Joowon Seo 3A » Fri Mar 13, 2020 5:51 pm

The equation helps us relate temperature, reaction constant, and the activation energy. IF plotting lnk to 1/T the slope is -Ea/R

kevinolvera1j
Posts: 103
Joined: Fri Aug 02, 2019 12:15 am

Re: Arrhenius Equation

Postby kevinolvera1j » Fri Mar 13, 2020 6:28 pm

Dina Marchenko 2J wrote:k=A*e^-Ea/RT

This formula helps determine the temperature dependence of reaction rates.
k is the reaction rate of the reaction.
A is a pre-exponential factor and has to do with the collision of the molecule (and if it is properly oriented when it collides in order to react)
Ea is the activation energy, or the energy input needed to activate the reaction
R is the gas constant
T is the temperature in kelvin

Given the information provided for you, you can find any of these unknown variables.

How can you distinguish between A, the pre exponential factor, and A, the reactant such as in [A]?

vibha gurunathan 1h
Posts: 51
Joined: Mon Oct 07, 2019 12:15 am

Re: Arrhenius Equation

Postby vibha gurunathan 1h » Fri Mar 13, 2020 6:31 pm

Sidharth D 1E wrote:To expand on that, reactions that give a straight line when lnkr is plotted against 1/T are said to show Arrhenius behavior


What is arrhenius behavior?

Madelyn Romberg 1H
Posts: 102
Joined: Tue Oct 02, 2018 12:16 am

Re: Arrhenius Equation

Postby Madelyn Romberg 1H » Fri Mar 13, 2020 6:49 pm

Arrhenius behavior is when the graph of 1/kr is linear when plotted against 1/T


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