Difference between revisions of "Van der Waals equation"

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The law states:
 
The law states:
 
<cmath>\left(P-\alpha\frac{n^2}{V^2}\right)(V-\beta n)=nRT</cmath>
 
<cmath>\left(P-\alpha\frac{n^2}{V^2}\right)(V-\beta n)=nRT</cmath>
where <math>\alpha</math> and <math>\beta</math> are dependent on the gas, <math>V</math> is the volume, <math>P</math> is the pressure, <math>n</math> is the number of moles of gas, <math>R</math> is the [[universal gas constant]], <math>T</math> is the temperature.
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where <math>\alpha</math> and <math>\beta</math> are dependent on the gas, <math>V</math> is the volume, <math>P</math> is the pressure, <math>n</math> is the number of [[mole]]s of gas, <math>R</math> is the [[universal gas constant]], <math>T</math> is the temperature.
  
 
The van der Waals equation is useful for high-pressure gases where the [[ideal gas law]] is inaccurate.
 
The van der Waals equation is useful for high-pressure gases where the [[ideal gas law]] is inaccurate.

Revision as of 07:58, 11 March 2008

The van der Waals equation is an equation of state in thermodynamics relating the physical quantities pressure, volume, temperature, and van der Waals forces in a gas.

Equation

The law states: \[\left(P-\alpha\frac{n^2}{V^2}\right)(V-\beta n)=nRT\] where $\alpha$ and $\beta$ are dependent on the gas, $V$ is the volume, $P$ is the pressure, $n$ is the number of moles of gas, $R$ is the universal gas constant, $T$ is the temperature.

The van der Waals equation is useful for high-pressure gases where the ideal gas law is inaccurate.

See also

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