One mole of methane ($a=2.25{\mathrm{L}}^2\mathrm{atm}\mathrm{mo}{\mathrm{l}}^{-2}$, $b=0.0428\mathrm{L}\mathrm{mo}{\mathrm{l}}^{-1}$) occupies $0.500\mathrm{L}$ at a pressure of $40.0\mathrm{atm}$. Using the van der Waals equation and $R=0.0821\mathrm{L}\mathrm{atm}{\mathrm{K}}^{-1}\mathrm{mo}{\mathrm{l}}^{-1}$, the temperature in K (nearest integer) is

Numerical answer type, answer in K, tolerance 2.