Example 1: Equimolar Counter-Diffusion
Ammonia gas (A) and nitrogen (B) are stored in 2 large storage tanks respectively. The tanks are maintained at constant pressure of 1.0132 x 105 Pa pressure and temperature of 298K. A uniform tube 0.1-m long connects the 2 tanks, as shown below:
The partial pressure of A at point 1 is pA1 = 1.013 x 104 Pa and at point 2, pA2 = 0.507 x 104 Pa. The diffusivity DAB = 0.230 x 10-4 m2/s. R = 8314 m3.Pa/kg-mole.K
(a) Calculate the flux JA at
steady-state.
(b) Repeat for JB.
Comments on your results.
