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Example-1.2) Calculation of Molar Flux in Varying Cross-section SO2(A) is transferring at steady-state through non-transferring 02 (B) in a metal conduit, 2.0 meter long, at 10 bars and 598 K. The cross-section of the conduit is rectangular and tapers uniformly from an area of 300 mm by 400 mm to an area of 300 mm by 200 mm. The partial pressure of So, is measured as 0.22 bar and 0.055 bar at two ends. Calculate total molar flux of SO, at mid-point of the conduit. The molecular diffusivity of So, in O, at 1 bar and 25 C is 2.25 X 105 m2/s