What is an Equation of State ?


Equation of State

(EOS) is an equation that relates the pressure, temperature, and the molar volume of a substance.
You already know a few things about one EOS.
You probably call it the Ideal Gas Law.
We call it the

Ideal Gas Equation of State

, because it is definitely NOT a law because it does not always accurately describe the relationship between P, V and T.
In this lesson, we will discuss the Ideal Gas EOS and a graphical EOS called the

Generalized Compressibilty Factor

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Ch 2, Lesson E, Page 1 - What is an Equation of State ?