Problem 2 Book problem 6.2-2 6.2-2. Equimolar Counterdiffusion of NH3 and N2 at Steady State. Ammonia gas (A) and nitrogen gas (B) are diffusing in counterdiffusion through a straight glass tube 2.0 ft (0.610 m) long with an inside diameter of 0.080 ft (24.4 mm) at 298 K and 101.32 kPa. Both ends of the tube are connected to large mixed chambers at 101.32 kPa. The par- tial pressure of NH3 is constant at 20.0 kPa in one chamber and 6.666 kPa in the other. The diffusivity at 298 K and 101.32 kPa is 2.30 × 10-5 m²/s. (a) Calculate the diffusion of NH3 in lb mol/h and kg mol/s. (b) Calculate the diffusion of N2. (c) Calculate the partial pressures at a point 1.0 ft (0.305 m) in the tube and plot PA, PB, and P versus distance z. Ans. (a) Diffusion of NH3 = 7.52 x 107 lb mol A/h, 9.48 × 10-11 kg mol A/s; (c) PA 1.333 x 104 Pa =