2.3. Convection and Its Influence on Mass Transfer

Try these first

1. 1.

   What is the primary driving force for mass transfer?

   Hint

   Consider what causes molecules to move.

2. 2.

   Define convection in the context of fluid dynamics.

   Hint

   Think about how the whole fluid moves, not just individual molecules.

3. 3.

   What defines the driving force of mass transfer?

   • Temperature difference
   • Pressure difference
   • Concentration difference

   Hint

   Consider what causes substances to mix.

4. 4.

   Is convection higher in turbulent flow compared to laminar flow?

   • True
   • False

   Hint

   Think about how fluids behave differently under these conditions.

5. 5.

   In a chemical reactor, the mass transfer coefficient for a reactant is measured at 5.0 m/s. Given a concentration of 20 mol/m^3 at one end and 0 mol/m^3 at another, calculate the expected mass transfer rate.

   Hint

   Don't forget the relationship between mass transfer rate, coefficient, and concentration difference.

6. 6.

   Describe what would happen to mass transfer efficiency if turbulence in the flow decreased significantly. Provide reasoning.

   Hint

   Consider how fluid movement impacts concentration gradients.