3.3. Application of Coefficients in Evaporation Problems

Try these first

1. 1.

   Define mass transfer coefficient in your own words.

   Hint

   Think about the phases involved in evaporation.

2. 2.

   True or False: DNAPLs have a density less than water.

   Hint

   Recall the definition of DNAPLs.

3. 3.

   What does a mass transfer coefficient indicate?

   • The speed of a stream
   • The rate of mass transfer
   • The density of a liquid

   Hint

   Consider what impacts the movement of molecules.

4. 4.

   True or False: DNAPLs can cause significant contamination of water bodies.

   • True
   • False

   Hint

   Recall the properties of DNAPLs.

5. 5.

   You have a river with DNAPL concentration of 5 mg/L and an expected V* of 15 mg/L. With a calculated mass transfer coefficient of 0.25 cm/h, calculate the flux.

   Hint

   Use the flux equation directly, substitute the given values.

6. 6.

   If you had to create a new correlation for a compound with significantly different properties, what factors would you need to consider?

   Hint

   Think of how fundamentals change with different substances.