Frequency Factor

Arrhenius Equation:

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Drew Myers 4G
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Joined: Sat Aug 17, 2019 12:17 am

Frequency Factor

Postby Drew Myers 4G » Wed Mar 11, 2020 5:12 pm

What is the frequency factor, and how is it determined?

Aman Sankineni 2L
Posts: 103
Joined: Fri Aug 30, 2019 12:17 am

Re: Frequency Factor

Postby Aman Sankineni 2L » Wed Mar 11, 2020 7:03 pm

The pre-exponential factor (A) is part of the Arrhenius equation, which was formulated by the Swedish chemist Svante Arrhenius in 1889. The pre-exponential factor is also known as the frequency factor and represents the frequency of collisions between reactant molecules. Although often described as temperature-independent, it is actually dependent on temperature because it is related to molecular collision, which is a function of temperature. It can be determined by solving for A in the Arrhenius equation.

TimVintsDis4L
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Joined: Sat Aug 17, 2019 12:17 am

Re: Frequency Factor

Postby TimVintsDis4L » Thu Mar 12, 2020 10:09 am

It's pretty much the likelihood of a molecular collision to occur. An H+ and H+ collision is way more likely to occur then an H H O since the molecules have to hit each other at a certain angle in order for the bonds to form.

Anna Heckler 2C
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Joined: Wed Sep 18, 2019 12:18 am

Re: Frequency Factor

Postby Anna Heckler 2C » Thu Mar 12, 2020 10:23 am

Used in the Arrhenius equation, the frequency factor is used to describe the rate of molecular collisions.

Tanmay Singhal 1H
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Joined: Sat Jul 20, 2019 12:16 am

Re: Frequency Factor

Postby Tanmay Singhal 1H » Thu Mar 12, 2020 1:07 pm

how likely it is for collisions to occur

Keya Jonnalagadda 1A
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Joined: Mon Jun 17, 2019 7:24 am

Re: Frequency Factor

Postby Keya Jonnalagadda 1A » Thu Mar 12, 2020 1:22 pm

To consolidate the important points of the other posts, the frequency factor is the frequency that molecules of the reactants collide with each other to react. This frequency is dependent on the temperature. We use it in conjunction with the rate constant, k, and the activation energy of the reaction, in the equation: k=Ae^(-Ea/RT).

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

Re: Frequency Factor

Postby rohun2H » Thu Mar 12, 2020 1:44 pm

Frequency factor represents the collisions of molecules in the correct orientation


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