2.6. Challenges in Measurement

Try these first

1. 1.

   Describe what is meant by 'interface' in mass transfer.

   Hint

   Think about where different states of matter interact.

2. 2.

   What is meant by the term 'concentration gradient'?

   Hint

   This change can help facilitate diffusion.

3. 3.

   What is an interface in mass transfer?

   • The boundary between two liquids
   • The line between two solids
   • The meeting point of different phases

   Hint

   Consider what happens when liquid and gas interact.

4. 4.

   True or False: Steady state means that the concentration at the interface remains constant over time.

   • True
   • False

   Hint

   Think about balance in flows.

5. 5.

   Discuss how you would experimentally determine the mass transfer coefficient for a gas-liquid system. What factors would you consider?

   Hint

   Outline your experimental design.

6. 6.

   You have a lake with wind causing two different mixing states. Explain how you would theoretically compare the mass transfer coefficients for the two phases and what assumptions might you need to make.

   Hint

   Consider how environmental conditions affect mass transfer.