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. 1975 Jan-Feb;79A(1):71–79. doi: 10.6028/jres.079A.003

Table 8.

Constants for the Tσ(ρ) equations

Methane Ethane
Saturated liquid, eq (5.4)
γ 1/2 1/2
A1 11.4317 7230 23.7245 1840
A2 −3.8765 9480 −14.8860 5161
A3 0.5378 8326 5.4317 7443
A4 .0 −1.0715 0566
A5 .0 0.0913 5183
Saturated vapor, eq (5.5)
s 1/4 1/4
B0 0.9034 9557 0.8681 0517
B1 .0 .0151 6978
B2 .0 −.7296 0432
B3 −.3834 4338 1.0096 5493
B4 −3.9210 8638 −8.7340 2710
B5 6.2600 3837 21.1071 2823
B6 −9.3296 0083 −31.4499 4087
B7 5.6060 2816 17.8637 0397