A sheet of polyethylene 1.5-mm thick is being used as an oxygen barrier at a temperature of 600K. If the flux is 2.48 x 10-5 kg/m2 s, what concentration of oxygen must be maintained on the high-pressure side to ensure that the concentration

Complete Question

The complete question is shown on the first uploaded image  

The concentration of  high-pressure side is  

Explanation:

From the question we are told that

    The thickness of the polyethylene is  

     The  temperature is  

      The flux is  

      The concentration on the low-pressure side is  

       The initial diffusivity  is  

       The activation energy for  diffusion is  

Generally the diffusivity  of the oxygen at 600 K can be  mathematically evaluated  as

substituting values  

Generally the flux is mathematically represented as

Where is the concentration of oxygen at the higher side

       So  

substituting values  

the answer is definitely c.