[UPSC CSE 1994] Thermodynamics (Q186, 20M)

Calculate the Joule-Thomson coefficient for nitrogen gas at 293 K and 100 atm. pressure taking C_p = 8.21\text{ cal deg}^{-1}\text{ mole}^{-1} a = 1.39\text{ liter}^2\text{ atm-mole}^{-2} and b = 3.92 \times 10^{-2}\text{ liter mole}^{-1}