In parallel

Example: Calculate the coefficient of diffusion for $C{O}_2$ transfer across a two$-$layer film.

Material $1$ has a thickness of $40m$ and a

D $P_1^{C{O}_2}=2*{10}^{5}c{m}^3*m*m^{-2}*$ bar. Material $2$ has a thickness of $10m$ and a D $P_2^{C{O}_2}=5\mathrm{.}65c{m}^3*m*m^{-2}*$ bar.

$G=D*\frac{A}{d}$

$G=\frac{1}{R}$

$1$ bar $-=100,000$ Pa