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Learn the Essentials in 10 Hours

• Class-1 
• Class-2 
• Class-3 
• Class-4 

• Molecular Diffusion 
• Mass Transfer Coefficients 
• Absorption 
• Distillation 
• Extraction 
• Humidification 
• Drying 

• Diffusion of Ammonia through Stagnant Air 
• N_A Equal to J_A 
• Relation between Molar Fluxes of Reactive System 
• Diffusion through Slab 
• Diffusion of SO₂ through Stagnant Air-film 
• Comparison between Two Types of Diffusion 
• Diffusivity from Equimolar Counter Diffusion Data 
• Rate of Diffusion of Solute into Spherical Droplet 
• Diffusivity in Gas to that of in Liquid 
• Diffusivity vs Pressure in Gases 
• Diffusivity vs Temperature in Liquid 

• Transfer of Solute from Gas to Liquid - Two-film Theory 
• Controlling Resistance from Individual Mass Transfer Coefficients 
• Relative Resistances from Concentration Difference 
• Absorption of Solute where K_y=k_y 
• Resistance for Solute with Less Solubility in Liquid 
• Conditions for Absorption to become Gas-film Controlled 
• Controlling Resistance for Absorption of CO₂ in Amine 
• Absorption of H₂S in Amine - Controlling Resistance 
• Absorption of Sparingly Soluble Gas in Liquid 
• Gas-film Thickness from Diffusion Rate and Interface Concentration 
• Concentration Profile for Absorption of Solute 
• Molar Flux and Interfacial Concentration 
• Colburn j-factor of Mass Transfer 
• Mass Transfer Correlation in terms of j_D Factor 
• Reynolds Analogy - Applicability 
• Correlation for Heat Transfer from that of Mass Transfer 
• Time for Complete Sublimation 
• Unsteady Dissolution of Solute 
• Rate of Dissolution from Mass Transfer Coefficient 
• Significances of Prandtl Number and Schmidt Number 
• Sherwood Number for Diffusion of Water in Air 
• Interfacial Area from Hold-up Data 

• Humidity Chart 
• Relation between Percentage and Relative Humidities 
• Mixing Air of Different Relative Humidities 
• Effect of Heating and Adiabatic Cooling 
• Relative Humidity from Dewpoint and Vapor Pressure Data 
• Change in Relative Humidity of Air due to Heating 
• Dry Bulb, Wet Bulb and Dew Point Temperatures 
• Dew Point, Dry-Bulb, Wet-Bulb Temperatures and Humidity 
• Constant Pressure Heating of Air 
• Humid Volume of Air - Water-vapor Mixture 
• Humid Heat of Gas 
• Adiabatic Saturation of Air 
• Humidity of Air from Wet-bulb Depression Data 
• Enthalpy of Air from Psychrometric Ratio 
• Mass and Energy Balances on Humid Air 
• Dry-Bulb Temperature of Air from Wet-Bulb Temperature Data 

• Time Required for Drying in Constant-Rate Period 
• Time for Drying from Constant-Rate Data 
• Time for Drying in Falling-Rate Period 
• Drying Time from Drying Curve 
• Drying Rate from Moisture Content vs Time Data 
• Time for Drying from Drying-Rate and Free-Moisture Data 
• Drying Time from Drying Rate and Equilibrium Moisture Data 
• Heat Transfer Coefficient of Drying Operation 
• Drying Rate and Time from Mass Transfer Coefficient Data 

• Absorption Factor from Vapor Pressure Data 
• Minimum Required Flow Rate of Steam for Stripping 
• Absorption Operation with Increased L/G 
• Best Operating Pressure and Temperature of Absorbers 
• Number of Stages of Countercurrent Absorber 
• Absorption in Countercurrent Two-stage Column 
• Number of Stages for Absorption with A = 1 
• Number of Stages for Stripping - Reduction to Simple Equation 
• Constant Change in Composition of Tray Column 
• Number of Trays for Absorption with Constant Change in Composition 
• Number of Stages of Stripper 
• Height of Packed Bed Absorber 
• Height of Packed Column 
• Number of Transfer Units of Packed Bed Absorber 
• Number of Transfer Units for L/G = m 
• NTU and HTU 
• HTU vs Gas Flow Rate 
• HTU and Mass Transfer Coefficient 

• Relative Volatility and Equilibrium Ratio 
• Composition of Ternary System from Relative Volatility Data 
• Identifying the State of Mixture - Vapor / Liquid 
• Batch Distillation - Composition of Residue 
• Batch Distillation - Mole Fraction of Distillate 
• Batch Distillation - Moles of Residue 
• Batch Distillation - Product Composition vs Time 
• Flash Distillation - Feed Composition 
• Flash Distillation - Composition and Energy Required 
• Composition Leaving the Partial Condenser 
• Maximum Difference between y* and x 
• Slope of q-Line 
• Reflux Ratio from q-line and Equilibrium Curve Meeting Point 
• Reflux Ratio from Vapor Compositions in Successive Trays 
• McCabe-Thiele Method - Reflux Ratio and Feed Quality 
• Feed Conditions from Operating Lines Data 
• Reflux Ratio from Enriching Section Data 
• Reflux Ratio and Composition from Material and Energy Data 
• Stripping Line of Column with Open Steam 
• Composition of Vapor from Column at Total Reflux 
• Minimum Number of Trays for a Separation 
• Reflux Ratio vs Product Composition 
• Number of Trays and Reboiler Heat Load at Minimum Reflux 
• Cost vs Reflux Ratio 
• Vapor Composition for the given Murphree Efficiency 
• Murphree Vapor Efficiency 
• Scale-up of Distillation Column 
• Distillation of Azeotropic System with Two Columns in Series 

• Selectivity or Separation Factor 
• R/E from Lever-Arm Rule 
• Ternary Diagram for Extraction Calculations 
• Solvent Required for Single-Stage Extraction 
• Amount of Solute Extracted in a Equilibrium Stage 
• Two-stage Cross-current Extraction 
• Cross-current Extraction with N-stages 
• Solvent Requirement for Cross-current Extraction 
• Two-stage Counter-current Extraction 
• Counter-current Extraction - Minimum Solvent and Number of Stages 
• Extraction followed by Distillation - Mass Balance 
• Height of Continuous-Contact Extractor 
• Mass Transfer Coefficient from Concentration and Molar Flux