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(a) Ammonia gas is being absorbed by water in a wetted-wall column. At one level of the column, the following data applies: gas-phase mass transfer coefficient 5.22 × 10-9 kmol m-2 s-1 Pa-1 liquid-phase mass transfer coefficient 3.88 × 10-5 m s-1 Henry's constant 0.955 kPa (kmol m-3)-1. Estimate the overall mass transfer coefficient KL.
(b) What is the ratio of the individual mass transfer resistances in Question 2 (a)
(c) Use the following additional information to find the mass transfer flux in the column: mole fraction of ammonia in liquid* 1.351 × 10-3 mole fraction of ammonia in gas* 0.065 total pressure of system 1.013 bar mole mass of ammonia 17 *Note: these values will need to be converted to concentrations in kmol m-3.
(d) What is the partial pressure of the ammonia gas at the gas/liquid interface?
(e) What is the molar concentration of the ammonia in the liquid at the interface?
What is the average billing to collection time (cycle time)? (Hint: instead of using # of entities, think about the Little's law with # of dollars going through the system.)
Check the values given for the discounted-cash-flow rate of return and net present worth. If the company requires a minimum rate of return of 10 percent, which system should be chosen?
Negligible heat is transferred from the nozzle to its surroundings. The approach velocity of the steam is negligible. The specific enthalpy of steam is 2974J/kg at 260°C and 7bar and 2860kJ/kg at 200°C and 4bar. Use the open-system energy balance ..
Determine the frequency of the rotor voltages of the induction machine.
Component Mass in Final State, Please solve specific problem below rather than providing examples. A rigid vessel having a volume of 0.028m^3 initially contains a mixture at 21 degrees Celsius and 100 kPa consisting of 79% Nitrogen
After the pH electrode is moved to an unknown buffer solution, the reading of the voltmeter is decreased by 25%. Calculate the pH of the unknown buffer solution.
If this machine is operated from a 440-V dc supply, determine the speed at which this motor will run and the current taken from the supply, assuming no mechanical load, no friction and wind age losses, and that the field current is maintained at 4..
acetyl chloride is a colorless fuming liquid used primarily in the chemical industry.a how is acetyl chloride produced?
A toroid with a circular cross section is shown in Figure P11.2.3. It is made from cast steel with a relative permeability of 2500. The magnetic flux density in the core is 1.25 T measured at the mean diameter of the toroid.
In the chlorination of ethylene to produce dichloromethane (DCE), the conversion of ethylene is reported as 99.0%. If 94 mol of DCE are produced per 100 moll of ethylene reacted, calculate the selectivity and the overall yield based on ethylene. T..
You add an aqueous solution of lead nitrate to an aqueous solution of potassium iodide. Draw highly magnified views of each solution individually, and the mixed solution including any product that forms.
gold has a face centered cubic crystal structure where there are four atoms per unit cell.below is a calculated xrd
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