What is Van der Waals equation? Derive it.

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What is Van der Waals equation? Derive it.

Monjur Alahi

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2025-01-04 04:42

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Van der Waals equation is also known as Van der Waals equation of state for real gases which do not follow ideal gas law. According to ideal gas law, PV = nRT where P is the pressure, V is the volume, n is the number of moles, T is the temperature and R is the universal gas constant. The Van der Waals Equation derivation is explained below.

Derivation of Van der Waals equation

For a real gas, using Van der Waals equation, the volume of a real gas is given as (Vm – b), where b is the volume occupied by per mole.