Question $3$

Answer True or False,

a$)$ In Fick's law, the proportionality constant in a binary mixture of species A and $B$ is known as the diffusion coefficient

b$)$ The mass diffusivity is commonly reported in units of $c\frac{m^3}{s}$

c$)$ the gas$-$phase diffusion coefficient is inversely proportional to total system pressure

d$)$ The gas$-$phase diffusion coefficients increase as the molecular diameter and molecular weight of either A and$/$or $B$ increases

Question $4(4$ marks$)$

Determine the binary diffusion coefficient of $O_2$ in $N_2$ at $600K$ and $5$ atm. The binary diffusion coefficient of $O_2$ in $N_2$ at $T_1=273K$ and $P_1=1$atm is given to be $1\mathrm{.}3{10}^5\frac{m^2}{s}.$