Given: Thick wall natural rubber pipe with outer diameter 40mm and inner diameter 32mm is in use for transport of 100% CO₂ on a distance of 3 meters. The CO₂ concentration in the surrounding environment is 15%. Surrounding temperature is 25C.

To find:

1. Mole diffusion flux of CO₂ through the pipe wall

2. Mass diffusion flux of CO₂ through the pipe wall