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One of the cubic equations of real gas state defining the Compressibility factor
as a function of
Gas pressure and Gas temperature :
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| Z^3 - (1-B) \, Z^2 +(A-2B-3B^2) \, Z -(AB-B^2-B^3) = 0 |
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| A=\frac{a 0.45724 \,cdot \alpha \, p}{ R^2 \, T^2}
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B= | b \, | R \, T | | a | | 45724 | {R^2 \, T_c^2} | c}
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b = 0.07780 \cdot \frac{R \, T_c}{p_c} |
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| \alpha = \left( 1 + \kappa \, (1-T_r^{0.5}) \right)^2 |
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\kappa = 0.37464 + 1.54226 \, \omega -0.26992 \, \omega^2 |
where
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