Question

The virial coefficients for N2 at 223.15 K are B = -28.8 cm3 /mol and C = 3570 cm6 /mol2 . Using the approximation Z = 1 + B(n/V) + C(n/V)2 , calculate the pressure (other than P = 0 atm) for which Z ( = PV/nRT ) is equal to 1. What is the physical reason for the apparent “ideality” of N2 at this combination of temperature and pressure?

Answer 1