Calculate the second virial coefficient, B11, for pure Ar, B22 for pure CH4, and the second virial coefficient for the unlike interaction in a mixture, B12 at 239.8 K directly from the values of the Lennard-Jones parameters reported in Table 4.2. Compare the values to the following data reported in the literature: B11 = 231.4 cm3/mol, B22 = 273 cm3/mol, and B12 = 248.1 cm3/mol.
Use the following “mixing” rules for the Lennard-Jones parameters:

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012 +02) and 812 = VE ( + V8182