Solubility of CO2 in PET polymer is 0.73 cm3 (STP)/[cm3 (polymer).atm]. A sachet of PET film of 25 m thickness containing food product is packed under positive pressure of CO2 at 38 mm Hg. Compute the rate of diffusion of CO2 in g(O2)/m2 .d. Diffusivity of CO2 through PET is 2x10-9 cm2 /s