2.2. Resistance in Mass Transfer

Try these first

1. 1.

   What is the definition of mass transfer?

   Hint

   Think about how substances move in different phases.

2. 2.

   What is the significance of the interface in mass transfer?

   Hint

   Consider what happens at the boundary of two different materials.

3. 3.

   What does a higher viscosity generally indicate for mass transfer resistance?

   • Higher resistance
   • Lower resistance
   • No effect

   Hint

   Consider how thick fluids behave compared to thin ones.

4. 4.

   True or False: The interface between air and water can experience steady-state conditions.

   • True
   • False

   Hint

   Reflect on what steady-state implies for system conditions.

5. 5.

   Evaluate how the concentration gradient across an air-water interface can change with temperature variation. How does this relate to the maximum capacity of air to hold water vapor?

   Hint

   Consider the relationship between temperature, vapor pressure, and saturation levels.

6. 6.

   Design an experiment to measure the mass transfer coefficient for a solute diffusing in water. Detail the steps you would take and the factors you would control.

   Hint

   Remember to account for all variables affecting diffusion rates.