1.8. Evaporation Flux and Mass Transfer Coefficients

Try these first

1. 1.

   What is evaporation flux?

   Hint

   Think about the units involved.

2. 2.

   Define mass transfer coefficient.

   Hint

   Remember its relation to phase changes.

3. 3.

   What does the mass transfer coefficient indicate?

   • Rate of evaporation
   • Rate of flow between phases
   • Concentration at equilibrium

   Hint

   Think about the role of the coefficient in transition between states.

4. 4.

   True or False: Evaporation flux is solely determined by temperature.

   • True
   • False

   Hint

   Consider all factors affecting flux.

5. 5.

   A lake with a chemical concentration of 50 mg/L is assumed to have a mass transfer coefficient of 0.1 m/s. Calculate the evaporation flux if the area exposed to air is 1000 m².

   Hint

   Remember to apply the units consistently!

6. 6.

   Analyze how the stability class of the atmosphere might impact Gaussian dispersion in an urban setting with a strong inversion layer.

   Hint

   Connect the conditions of atmospheric stability to dispersion characteristics.