## Frequency Factor

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

Drew Myers 4G
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

### Frequency Factor

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

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

### Re: Frequency Factor

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
Posts: 104
Joined: Sat Aug 17, 2019 12:17 am

### Re: Frequency Factor

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

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

how likely it is for collisions to occur

Posts: 50
Joined: Mon Jun 17, 2019 7:24 am

### Re: Frequency Factor

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

### Re: Frequency Factor

Frequency factor represents the collisions of molecules in the correct orientation