The second virial coefficient of methane can be approximated by the empirical equation , where a = 0.1993 bar1, b = 0.2002 bar1, and c = 1131 K2 with…

The second virial coefficient of methane can be approximated by the empirical equation , where a = —0.1993 bar−1, b = 0.2002 bar−1, and c = 1131 K2 with 300 K < T< 600 K. What is the Boyle temperature of methane?