Derive the differential equation that describes the desorption in a plug flow basin (Hint: write a mass balance equation for an elemental volume ΔV). Then, integrate the differential equation with the proper boundary conditions to obtain mole fraction equation for plug flow basin in the lecture notes

50 g of pure Na2CO3 were dissolved in water and the volume of this solution was 200 mL. To this solution, 500 mL of 0.10 M HCl solution were added. Calculate the followings:                                                     Moles of Na2CO3 dissolved Moles of HCl added Moles of Na2CO3 reacted with HCl Moles of Na2CO3 left unreacted Molarity of Na2CO3 solution after the reaction

The volume percentages of O2 were measured as 25% and 15% at two points 2 mm away from each other in an O2-N2 gas mixture under 30°C and 2 bar pressure. According to this; Calculate the total molar fluxes assuming that a) O2 and N2 radiate in opposite directions at equal molar current b) N2 is at rest and only O2 radiates. The molecular diffusion coefficient of oxygen in nitrogen at 30°C and 2 bar pressure is 9.5x10-6 m2 /s.

Below is a ternary liquid phase diagram containing propionic acid and water at 70:30 mass ratio is fed to a mixer at 3.181 kg/s with pure cyclohexane as solvent. What is the flow rate of the pure cyclohexane (solvent) in order to attain 30:70 mass ratio of solute and solvent in the extract (solvent-rich) stream?

1.6 Properties: Diffusivity Estimate the molecular diameter and diffusion coefficient for the proteins ribonuclease (MW 13,700 Da), hemoglobin (MW 68,000), and urease (MW 480,000), assuming the molecules are spherical and the density of each protein molecule is 1.3 g/cm³.

We Know that Atmosphere CO2 can dissolve in the ocean. Given the formula: Solve for the value of KH  For CO2 When the temperature is 6 Degrees Celcieus.2) Calculate the Concentration of CO2 with the value of KH, On the surface of the Ocean

Question 2

Example 5.1. an engineer in the chemical plant, you are asked to design an acetonerecovery system having the flow sheet illustrated on the next page. In this Example, to make the calculation simple, all concentrations of both gases and liquids are in presented in weight (mass) percent (please note, Acetone vapour is considered toxic to the environment (as well as human health). As however, that, normally, for gas phase, the concentration is presented in “volume“ and “mole“ basis) Calculate the values of A, F, W, B, and D in kg per hour, if given G = 1,400 kg/h water (100%) w Ka/h Air tA ka/h Air 99.5 water O.5% Condenser Distillattet D kO/ Aceton e 99.0% water 1.0% Absorber Distillation column 2) column -Bottom ka/h Acetone 19.09% water 81.0% B kg/h Acetone 4.0% water 96.0% Feed G kg/h Acetone 3.0% Air 95.0% Water 2.0%

Which of the following describes the phenomenon of channeling? frothing in packed absorption columns due to surfactants in the liquid feed liquid flowing down through the plates of a tray tower    none of the choices  liquid running down the walls of a packed absorption column gas feed bypassing the falling liquid in an absorption column

1.Draw and fully label  a block flow diagram of the process.Determine the degrees of freedom (DOF) for the process to confirm whether the problem can be solved. 2.Derive the necessary equations which describe the overall and individual species molar balances. 3.Calculate  the molar composition (fractions) of the waste stream.