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  2. Redlich–Kwong equation of state - Wikipedia

    en.wikipedia.org/wiki/RedlichKwong_equation_of...

    The RedlichKwong equation is very similar to the Van der Waals equation, with only a slight modification being made to the attractive term, giving that term a temperature dependence. At high pressures, the volume of all gases approaches some finite volume, largely independent of temperature, that is related to the size of the gas molecules.

  3. PSRK - Wikipedia

    en.wikipedia.org/wiki/PSRK

    The Soave–RedlichKwong equation of state describes the vapor densities of pure components and mixtures quite well, but the deviations of the liquid-density prediction are high. For the VLE prediction of mixtures with components that have very differing sizes (e. g. ethanol, C 2 H 6 O, and eicosane, C 20 H 42) larger systematic errors are ...

  4. Cubic equations of state - Wikipedia

    en.wikipedia.org/wiki/Cubic_equations_of_state

    The van der Waals equation of state may be written as (+) =where is the absolute temperature, is the pressure, is the molar volume and is the universal gas constant.Note that = /, where is the volume, and = /, where is the number of moles, is the number of particles, and is the Avogadro constant.

  5. Equation of state - Wikipedia

    en.wikipedia.org/wiki/Equation_of_state

    His new formula revolutionized the study of equations of state, and was the starting point of cubic equations of state, which most famously continued via the RedlichKwong equation of state [3] and the Soave modification of Redlich-Kwong. [4] The van der Waals equation of state can be written as

  6. Real gas - Wikipedia

    en.wikipedia.org/wiki/Real_gas

    Critical isotherm for Redlich-Kwong model in comparison to van-der-Waals model and ideal gas (with V 0 =RT c /p c) The RedlichKwong equation is another two-parameter equation that is used to model real gases. It is almost always more accurate than the van der Waals equation, and often more accurate than some equations with more than two ...

  7. Thermodynamic modelling - Wikipedia

    en.wikipedia.org/wiki/Thermodynamic_modelling

    The most famous functional forms of this category are Redlich-Kwong, [3] Soave-Redlich-Kwong [4] and Peng-Robinson. [5] Although their initial form is empirically suggested, they are categorised as semi-empirical models as their parameters can be adjusted to fit the real experimental measurement data of the target system.

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  9. Virial expansion - Wikipedia

    en.wikipedia.org/wiki/Virial_expansion

    Almost all subsequent equations of state are derived from the van der Waals equation, like those from Dieterici, [7] Berthelot, [8] Redlich-Kwong, [9] and Peng-Robinson [10] suffer from the singularity introduced by 1/(v - b). Other equations of state, started by Beattie and Bridgeman, [11] are more closely related to virial equations, and show ...

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