ANSWER: Na=2.76x10^-4 kmol A/m^2s

In a binary laminar gas mixture, equimolar counter transfers of A and B occur at 1 bar pressure. The molar concentrations of A at point one and point two, which are 2mm apart, are measured as 0.04kmol/m3 and 0.008kmol/m3 respectively. Temperature in the gas phase does not remain constant and changes with distance as T=T1e2002, where T1 is the temperature at point 1 and its value is 305K,z is distance in m. Calculate the total molar flux of A. Molecular diffusivity at 1 bar and 305K is 2.5105m2/s. In a binary laminar gas mixture, equimolar counter transfers of A and B occur at 1 bar pressure. The molar concentrations of A at point one and point two, which are 2mm apart, are measured as 0.04kmol/m3 and 0.008kmol/m3 respectively. Temperature in the gas phase does not remain constant and changes with distance as T=T1e2002, where T1 is the temperature at point 1 and its value is 305K,z is distance in m. Calculate the total molar flux of A. Molecular diffusivity at 1 bar and 305K is 2.5105m2/s