# Van-der-waals-equation meaning

An equation of state that relates the pressure, volume, and absolute temperature of a gas taking into account the finite size of molecules, and their intermolecular attraction, having the form

*RT =*(*P + av*^{−2})(*v − b*), where*R*is the gas constant,*T*is the absolute temperature,*P*is the pressure,*v*is the volume, and*a*and*b*are constants.noun

An equation that relates the pressure, volume, and absolute temperature of a gas taking into account the finite size of molecules, and their intermolecular attraction, having the form

*RT =*(*P + av*^{&spminus;2})(*v − b*), where*R*is the gas constant,*T*is the absolute temperature,*P*is the pressure,*v*is the volume of fluid per molecule,*a*is a measure of the attraction of the molecules for each other (due to**van der Waals forces**), and*b*is the volume occupied by a single molecule. The equation accurately captures phase transitions between liquid and gas phases of substances.
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### Origin of van-der-waals-equation

- After Johannes Diderik
**van der Waals**##### From American Heritage Dictionary of the English Language, 5th Edition