Barrier technology - Kinetics: diffusion - The difference in chemical potential as driving force

3 important questions on Barrier technology - Kinetics: diffusion - The difference in chemical potential as driving force

The difference in chemical potential will act as the driving force for mass transfer, what is the difference caused by?

The difference in activity
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At the interface between two phases (e.g. A food matrix and a barrier material), which two properties are different at both sides?

  • The molar fractions
  • Activity coefficients
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Is the activity coefficient of a hydrophobic material high or low?

Quite high, does not dissolve in water
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