question 5
an equimolar counter diffusion takes place in an oxygen-hydrogen gas combination at steady steady state at a total pressure of 105 kPa and 25 degrees celsius. the partial pressures of oxygen at two planes that are 0.01 m apart and perpendicular to the direction of diffusion are 20 kPa and 10 kPa, respectively, whereas the mass diffusion flow of oxygen in the mixture is 1.6 x10^-5 kmol/m^2/s. Calculate the molecular diffusivity of the system. N.B. first show how you derive the equation and calculate the answer