2.7. Mass Transfer Coefficient

Try these first

1. 1.

   What is the mass transfer coefficient?

   Hint

   Think about how we measure transfer rates.

2. 2.

   Define a boundary layer.

   Hint

   Consider what happens at fluid interfaces.

3. 3.

   What does the mass transfer coefficient measure?

   • Rate of temperature transfer
   • Rate of mass transfer
   • Rate of energy transfer

   Hint

   Focus on mass, not energy or temperature!

4. 4.

   Boundary layers influence mass transfer resistance. Is this statement true or false?

   • True
   • False

   Hint

   Consider how closeness to a surface changes flow.

5. 5.

   A pollutant enters a lake with a concentration of 100 mg/L. How would you model the mass transfer coefficient to measure the rate at which this pollutant spreads in the water?

   Hint

   Consider how both convection and diffusion affect the spreading of pollutants.

6. 6.

   Describe how you would experimentally determine the mass transfer coefficient in a lab setting when studying air-water interactions.

   Hint

   Think about the experimental designs involving boundary layer measurements.