Vapour-liquid equilibrium N2?Ar?O2 for lower argon concentrations

This paper gives a set of concise formulae for the prediction of N2ArO2 phase equilibrium. The conditions are restricted to argon concentrations in the liquid less than 50 mole % and pressures below 15 atm. The formulae are suitable primarily for bubble-point computations, but can be built into a simple routine for successive approximation of dew points, which converges rapidly. The accuracy of the predicted equilibrium temperature is 0·1 K; compositions are predicted to 0·2 mole %.