How to Calculate the Number of Non-Compositional Variables | Gibbs Phase Rule

The image of the number of non-compositional variables is represented above. To calculate the number of non-compositional variables, three essential parameters are needed and these parameters are Number of Phases Present (P), Number of Degree of Freedom (F) and Number of Components in System (C).

The formula for calculating the number of non-compositional variables:

N = (P + F) – C

Where:

N = Number of Non-Compositional Variables
P = Number of Phases Present
F = Number of Degree of Freedom
C = Number of Components in System

Given an example;
Find the number of non-compositional variables when the number of phases is 24, the number of degree of freedom is 11 and the number of components in system is 9.

This implies that;

P = Number of Phases Present = 24
F = Number of Degree of Freedom = 11
C = Number of Components in System = 9

N = (P + F) – C
So, N = (24 + 11) – 9
N = (35) – 9
N = 26

Therefore, the number of non-compositional variables is 26.

Read more: How to Calculate and Solve for Calculate the Number of Components in System | Gibbs Phase Rule

How to Calculate the Number of Non-Compositional Variables Using Nickzom Calculator

Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the number of non-compositional variables.

To get the answer and workings of the number of non-compositional variables 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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To get access to the professional version via web, you need to register and subscribe to have utter access to all functionalities.
You can also try the demo version via https://www.nickzom.org/calculator

Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator
Android (Free) – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator

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 Phase Transformation under Materials and Metallurgical

Then, Click on Gibbs Phase Rule under Phase Transformation

Now, Click on Number of Non-Compositional Variables under Gibbs Phase Rule

The screenshot below displays the page or activity to enter your values, to get the answer for the number of non-compositional variables according to the respective parameter which is the Number of Phases Present (P), Number of Degree of Freedom (F) and Number of Components in System (C).

How to Calculate and Solve for Calculate the Number of Non-Compositional Variables | Gibbs Phase Rule

Now, enter the values appropriately and accordingly for the parameters as required by the Number of Phases Present (P) is 24, Number of Degree of Freedom (F) is 11 and Number of Components in System (C) is 9.

How to Calculate and Solve for Calculate the Number of Non-Compositional Variables | Gibbs Phase Rule

Finally, Click on Calculate

How to Calculate and Solve for Calculate the Number of Non-Compositional Variables | Gibbs Phase Rule

As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the number of non-compositional variables and presents the formula, workings and steps too.

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