The oxidation of ammonia is to be carried out over platinum gauze. The molar flow rate of ammonia is $10$mol

$mi{n}^{-1}$ at a temperature of $500K$ and a pressure of $202\mathrm{.}6$kPa. At these conditions the reaction is mass$-$transport

controlled. Is one $250-$mesh screen $10cm$ in diameter sufficient to achieve $60\%$ conversion? The wire diameter is

$0\mathrm{.}044mm.$ Assume $25\%$ excess air and ignore the effects of volume changes on the Reynolds number.

ADDITIONAL DATA:

Gas viscosity $=2\mathrm{.}69*{10}^{-5}kg{m}^{-1}{s}^{-1}$ at $500K$ and $2$atm;

Gas diffusivity $D=0\mathrm{.}247c{m}^2{s}^{-1}$ at $295K$ and $1$atm.