Benedict, Webb and Rubin equation of state: Difference between revisions
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{{ | The '''Benedict, Webb and Rubin equation of state''' is an empirical [[Equations of state | equation of state]], based on the [[Beattie-Bridgeman equation of state]], which has the following functional form (Eq. A10 of <ref>[http://dx.doi.org/10.1063/1.1750658 Manson Benedict, George B. Webb, and Louis C. Rubin "An Empirical Equation for Thermodynamic Properties of Light Hydrocarbons and Their Mixtures I. Methane, Ethane, Propane and n-Butane", Journal of Chemical Physics '''8''' pp. 334-345 (1940)]</ref>): | ||
:<math>P= RT\rho + \left( B_0 RT - A_0 - \frac{C_0}{T^2} \right)\rho^2 + (bRT -a)\rho^3 + a \alpha \rho^6 + \frac{c\rho^3 ( 1 + \gamma \rho^2) \exp (-\gamma \rho^2)}{T^2}</math> | |||
where <math>P</math> is the [[pressure]], <math>T</math> is the [[temperature]], <math>\rho</math> is the density, and <math>R</math> is the [[molar gas constant]]. | |||
<math>B_0</math>, <math>A_0</math>, <math>C_0</math>, <math>b</math>, <math>a</math>, <math>c</math>, <math>\gamma</math> and <math>\alpha</math> are adjustable parameters. | |||
==References== | ==References== | ||
<references/> | |||
'''Related reading''' | |||
*[http://dx.doi.org/10.1063/1.1723658 Manson Benedict, George B. Webb, and Louis C. Rubin "An Empirical Equation for Thermodynamic Properties of Light Hydrocarbons and Their Mixtures II. Mixtures of Methane, Ethane, Propane, and n-Butane", Journal of Chemical Physics '''10''' pp. 747-758 (1942)] | |||
*[http://dx.doi.org/10.1016/S0378-3812(99)00252-6 Giorgio S. Soave "An effective modification of the Benedict–Webb–Rubin equation of state",Fluid Phase Equilibria '''164''' pp. 157-172 (1999) ] | |||
[[category: equations of state]] | [[category: equations of state]] |
Latest revision as of 17:35, 23 November 2010
The Benedict, Webb and Rubin equation of state is an empirical equation of state, based on the Beattie-Bridgeman equation of state, which has the following functional form (Eq. A10 of [1]):
where is the pressure, is the temperature, is the density, and is the molar gas constant. , , , , , , and are adjustable parameters.
References[edit]
Related reading
- Manson Benedict, George B. Webb, and Louis C. Rubin "An Empirical Equation for Thermodynamic Properties of Light Hydrocarbons and Their Mixtures II. Mixtures of Methane, Ethane, Propane, and n-Butane", Journal of Chemical Physics 10 pp. 747-758 (1942)
- Giorgio S. Soave "An effective modification of the Benedict–Webb–Rubin equation of state",Fluid Phase Equilibria 164 pp. 157-172 (1999)