Redlich-Kwong Equation of State
Redlich-Kwong equation of state derives from the Van der Waals equation and generally more accurate. It is not used as much becaused the overall difficulty to use.
Redlich-Kwong Equation of State Formula |
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| \(\large{ p = \frac{R \; T}{ V_m \;-\; b } - \frac{ a }{ \sqrt{T} \; V_m \; \left( V_m \;+\; b \right)' } }\) | ||
| Symbol | English | Metric |
| \(\large{ p }\) = pressure of gas | \(\large{\frac{lbf}{in^2}}\) | \(Pa\) |
| \(\large{ a }\) = correction for the intermolecular forces | \(\large{dimensionless}\) | |
| \(\large{ b }\) = adjusts for the volume occupied by the gas particles | \(\large{in^3}\) | \(\large{mm^3}\) |
| \(\large{ V_m }\) = molar volume of gas \(\left( \frac{V}{n} \right) \) | \(\large{\frac{ft^3}{mol}}\) | \(\large{\frac{m^3}{mol}}\) |
| \(\large{ n }\) = number of moles of gas | \(\large{dimensionless}\) | |
| \(\large{ R }\) = specific gas constant (gas constant) | \(\large{\frac{lbf-ft}{lbm-R}}\) | \(\large{\frac{J}{kg-K}}\) |
| \(\large{ T }\) = temperature of gas | \(\large{R}\) | \(\large{K}\) |
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