A 30 mm thick cylindrical rubber stopper is used to seal a vessel in which CO2 stored at 2 atm and 25 C to seal. Only the bottom surface of the cylindrical stopper is in contact with the CO2. This surface is 4.10-4 m2. Calculate the stationary losses CO2 through this stop. It can be assumed that on the outside of the vessel the CO2 partial pressure is 0. The solubility of CO2 in rubber at 25 C and 2 atm is 0.80 Nm3 CO2 per m3 rubber and per atm CO2. The diffusivity of CO2 in rubber is 0.11.10-9 m2/s.