Hello!
I have this following problem and I don't know where to start. Can you guys help me? Thanks!
--Problem--
Am cubic (1m³) container of polyethylene, wall thickness 2mm, contains pure oxygen (O2) at 1.5 atm and 20°C. The container is placed in ambient air (21% O2 and 79% N2) at 1 atm and 20°C.
Estimate the total pressure and gas composition after:
a.) 1 month
b.) 1 year
c.) 5 years.
Hint:
The mass diffusion flux can be written as j_1= (P_12/L)*(p_1,0 - p_1,L)
The mass flux out of the container equals the change of mass per unit time in the container.
j=-1/A *dm/dt
Ideal gas law: pV = mRT
----
I tried to apply Fick's second law, but I have no idea about the boundary conditions.
I have this following problem and I don't know where to start. Can you guys help me? Thanks!
--Problem--
Am cubic (1m³) container of polyethylene, wall thickness 2mm, contains pure oxygen (O2) at 1.5 atm and 20°C. The container is placed in ambient air (21% O2 and 79% N2) at 1 atm and 20°C.
Estimate the total pressure and gas composition after:
a.) 1 month
b.) 1 year
c.) 5 years.
Hint:
The mass diffusion flux can be written as j_1= (P_12/L)*(p_1,0 - p_1,L)
The mass flux out of the container equals the change of mass per unit time in the container.
j=-1/A *dm/dt
Ideal gas law: pV = mRT
----
I tried to apply Fick's second law, but I have no idea about the boundary conditions.
