Gas A diffuses through a non diffusing gas mixture of B and C. The partial pressure data on both sides of the film of thickness 0.005m are pA1 = 0.4, PB1 = 0.4, pc1 = 0.2; PA2 -0.1, PB2 =0.6, pc3 =0.3 respectively. The binary gas diffusivities are DAB = 2.2 x 105 m /s; DAC = 6.5 x 105 m/s and DBC 7.5 x 10-5 m /s. Estimate the rate of diffusion of gas A. (16) (Apr/May '05)