We have steady-state diffusion of ammonia in air across a \(0.033 \mathrm{~mm}\) thick film. On one side of the film ammonia concentration is \(0.000180 \mathrm{kmol} / \mathrm{m}^{3}\), and on the other side it is \(0.000257 \mathrm{kmol} / \mathrm{m}^{3}\). What operating temperature is required to have an ammonia flux rate of \(9.60 \times 10^{-5} \mathrm{kmol} /\left(\mathrm{m}^{2} \mathrm{~s}\right)\) ? Pressure \(=0.90 \mathrm{~atm}\). Use the Chapman-Enskog theory to estimate diffusivity.