1.5. Application of Mass Transfer at the Interface

Try these first

1. 1.

   Define mass transfer in your own words.

   Hint

   Think about how substances move in different states.

2. 2.

   What factors influence evaporation rates?

   Hint

   Consider environmental conditions.

3. 3.

   What does mass transfer describe?

   • Movement of mass
   • Only evaporation
   • Chemical reaction

   Hint

   Consider how substances migrate in nature.

4. 4.

   True or False: Evaporation rates are unaffected by temperature.

   • True
   • False

   Hint

   Recall how heat impacts liquids turning into gas.

5. 5.

   A lake has an initial pollutant concentration of 500 mg/L. The mass transfer coefficient for evaporation is 0.1 m/s. Calculate the concentration after 10 minutes of evaporation assuming no additional pollutants enter.

   Hint

   Apply exponential decay equations.

6. 6.

   Evaluate the impact of varying wind speed on the mass transfer coefficients in a polluted lake environment.

   Hint

   Think about how fans increase evaporation in a wet area.