 |  Mass Transfer 42 Flashcards |  Start |
 | What is molecular diffusion? |  Card: 1 / 42 |
| Movement of molecules from high to low concentration. | Card: 2 / 42 |
| What does Fick's First Law describe? | Card: 3 / 42 |
| Steady-state diffusion in one dimension. | Card: 4 / 42 |
| Fill in the blank: The relationship between liquid and gas phase mass transfer coefficients is ______. | Card: 5 / 42 |
| K_y = k_y + m/k_x | Card: 6 / 42 |
| True or False: The overall mass transfer coefficient is always higher than individual phase coefficients. | Card: 7 / 42 |
| False; it can be lower depending on resistance. | Card: 8 / 42 |
| What is the purpose of a packed tower in absorption? | Card: 9 / 42 |
| To increase contact area between gas and liquid. | Card: 10 / 42 |
| How is the height of packing calculated? | Card: 11 / 42 |
| Z = H_OL × N_OL | Card: 12 / 42 |
| What happens when the liquid flow rate is 1.5 times the minimum? | Card: 13 / 42 |
| It increases absorption efficiency. | Card: 14 / 42 |
| Which method is used to determine the number of stages in distillation? | Card: 15 / 42 |
| McCabe-Thiele method. | Card: 16 / 42 |
| What is the significance of the Sherwood number? | Card: 17 / 42 |
| It is the mass transfer analog of the Nusselt number. | Card: 18 / 42 |
| What is the equilibrium relationship for gas-liquid systems? | Card: 19 / 42 |
| Describes the concentration of the solute in both phases. | Card: 20 / 42 |
| What does the term 'minimum reflux ratio' refer to? | Card: 21 / 42 |
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| The least reflux needed for separation efficiency. | Card: 22 / 42 |
| Which variable controls mass transfer in a liquid-liquid extraction? | Card: 23 / 42 |
| Distribution coefficient, K_D. | Card: 24 / 42 |
| In distillation, what causes the need for a reboiler? | Card: 25 / 42 |
| To provide the necessary vaporization for separation. | Card: 26 / 42 |
| Scenario: You want to enhance gas absorption. What can you do? | Card: 27 / 42 |
| Increase liquid flow rate or surface area. | Card: 28 / 42 |
| What is crystallization? | Card: 29 / 42 |
| The process of forming solid crystals from a solution. | Card: 30 / 42 |
| Compare absorption and stripping. | Card: 31 / 42 |
| Absorption adds gas to liquid; stripping removes gas from liquid. | Card: 32 / 42 |
| What role does temperature play in mass transfer? | Card: 33 / 42 |
| It affects diffusivity and equilibrium constants. | Card: 34 / 42 |
| Fill in the blank: The overall mass transfer coefficient accounts for ______. | Card: 35 / 42 |
| Resistance from both gas and liquid phases. | Card: 36 / 42 |
| What does a high Schmidt number indicate? | Card: 37 / 42 |
| Dominance of viscous forces over diffusive forces. | Card: 38 / 42 |
| What is the function of membranes in separations? | Card: 39 / 42 |
| To selectively allow certain species to pass through. | Card: 40 / 42 |
| What is the driving force in mass transfer? | Card: 41 / 42 |
| Difference in concentration or partial pressure. | Card: 42 / 42 |
| Completed! Keep practicing to master all of them. |  Restart |
