2. Mass Transfer Across Interfaces

Try these first

1. 1.

   Define mass transfer coefficient.

   Hint

   Focus on the relationship between phases.

2. 2.

   What does Henry's law state?

   Hint

   Think about gas concentrations in liquids.

3. 3.

   What does a mass transfer coefficient measure?

   • The speed of sound
   • The rate of substance transfer
   • The density of a fluid

   Hint

   Think about the roles in phase interactions.

4. 4.

   True or False: The overall mass transfer resistance is the sum of resistances from the liquid and gas phases.

   • True
   • False

   Hint

   Look at how resistances are treated in equations.

5. 5.

   If a system has a liquid phase resistance of 1500 and a gas phase resistance of 300, calculate the total resistance and identify which phase controls the mass transfer.

   Hint

   Identify the controlling phase based on resistance values.

6. 6.

   A gas has a concentration of 0.05 mol/L, and the liquid phase has 2 mol/L. If the Henry’s constant is 40 L/mol, what will be the equilibrium concentration in the gas phase?

   Hint

   Apply the formula learned from Henry's law.