The image above represents frequency factor of diffusion. To calculate the frequency factor of diffusion, five essential parameters are needed and these parameters are Interatomic Distance (σ), Jump Frequency (vo), Coordination Number (z), Gas Constant (R) and Entropy Change (ΔS).
The image above represents frequency factor of diffusion:
Do = σ²voz/6 . eΔS/R
Where:
Do = Frequency Factor of Diffusion
σ = Interatomic Distance
vo = Jump Frequency
z = Coordination Number
R = Gas Constant
ΔS = Entropy Change
Let’s solve an example;
Find the frequency factor of diffusion when the interatomic distance is 11, the jump frequency is 22, the coordination number is 14, the gas constant is 17 and the entropy change is 10.
This implies that;
σ = Interatomic Distance = 11
vo = Jump Frequency = 22
z = Coordination Number = 14
R = Gas Constant = 17
ΔS = Entropy Change = 10
Do = σ²voz/6 . eΔS/R
That is, Do = (11)²(22)(14)/6 . e10/17
Do = (121)(22)(14)/6 . e0.588
Do = 37268/6 . 1.80
So, Do = 6211.33 . 1.80
Do = 11185.41
Therefore, the frequency factor of diffusion is 11185.41.
Read more:Â How to Calculate and Solve for Activation Energy of Diffusion | Mass Transfer
How to Calculate Frequency Factor of Diffusion With Nickzom Calculator
Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the frequency factor of diffusion.
To get the answer and workings of the frequency factor of diffusion using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.
You can get this app via any of these means:
Web – https://www.nickzom.org/calculator-plus
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You can also try the demo version via https://www.nickzom.org/calculator
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Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Materials and Metallurgical under Engineering.
Now, Click on Mass Transport under Materials and Metallurgical
Now, Click on Frequency Factor of Diffusion under Mass Transport
The screenshot below displays the page or activity to enter your values, to get the answer for the frequency factor of diffusion according to the respective parameter which is the Interatomic Distance (σ), Jump Frequency (vo), Coordination Number (z), Gas Constant (R) and Entropy Change (ΔS).
Now, enter the values appropriately and accordingly for the parameters as required by the Interatomic Distance (σ) is 11, Jump Frequency (vo) is 22, Coordination Number (z) is 14, Gas Constant (R) is 17 and Entropy Change (ΔS) is 10.
Finally, Click on Calculate
As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the frequency factor of diffusion and presents the formula, workings and steps too.
