The possibility is studied of determining the parameters of the potent
ial of intermolecular interaction for a mixture in terms of the values
of parameters of the potential of intermolecular interaction of compo
nents. Comparison is given of the thermodynamic properties of a gas mi
xture, calculated by different methods. Calculations are made for a he
lium-nitrogen binary mixture and for a helium-neon-nitrogen ternary mi
xture.