18.2-2. Diffusion Flux and Effect of Temperature and Pressure. Equimolar counterdiffu- sion is occurring at steady state in a tube 0.11 m long containing N2 and CO gases at a total pressure of 1.0 atm abs. The partial pressure of N2 is 80 mmHg at one end and 10 mm at the other end. Predict the DAB by the method of Fuller et al. (F1) (a) Calculate the flux in kg mol/s 2 m² at 298 K for N2. (b) Repeat at 473 K. Does the flux increase? (c) Repeat at 298 K, but for a total pressure of 3.0 atm abs. The partial pres- sure of N₂ remains at 80 and 10 mmHg, as in part (a). Does the flux change? Ans. (a) DAB = 2.05 x 10-5 m²/s, NA = 7.02 x 107 kg mol/s - m²; (b) N₁ = 9.92 × 107 kg mol/s m2; (c) N₁ = 2.34 × 107 kg mol/s + m²