Van der Waals equation

The van der Waals equation (or van der Waals equation of state; named after Johannes Diderik van der Waals) is an equation of state that generalizes the ideal gas law based on plausible reasons that real gases do not act ideally.


where (a) is a constant whose value depends on the gas, (b) is the volume that is occupied by one mole of the molecules, (V_m) is the molar volume of the gas, (R) is the universal gas constant, (T) is temperature, (P) is pressure.



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