Noted. This paper is in our queue now. Check back tomorrow.
We could not record that here. Email the paper name to hirenjsca@gmail.com and we will add it.
Define molecular diffusion. Derive the equation for steady state diffusion of liquid A through non diffusing liquid B.
Derive the equation which shows relationship between overall mass transfer coefficients (represented by Ky and Kx ) and individual mass transfer coefficients (represented by ky and kx ) with neat digram.
Alcohol vapor is being absorbed from a mixture of alcohol vapor and water vapor by means of a nonvolatile solvent in which alcohol is soluble but water is not. The temperature is 97°C and the total pressure is 760 mm Hg. The alcohol vapor can be considered to be diffusing through a film of alcohol-water-vapor mixture 0.1 mm thick. The mole % of alcohol in the vapor at the outside of the film is 80%, and that on the inside, next to the solvent is 10%. The diffusivity of alcohol-water- vapor mixture at 25°C and 1 atm is 0.15 cm²/ sec. Calculate the rate of diffusion of alcohol vapor in kg per hour if the area of the film is 10 m².Moleculer weight of Alcohol = 46 g/mol
At 293 K solubility of ammonia in water is given by Henry’s law p=0.3672 C, where p is in atmosphere and C is in kmol/m². A mixture of 15 % ammonia and 85 % air by volume at 1 atm is in contact with an aqueous solution containing 0.147 gmol/lit. The air velocity is such that kG/ kL=0.9. Find the concentration of ammonia and partial pressure at interface.
An air-NH3 mixture containing 5% NH3 is being scrubbed with water in a packed tower to recover 95% NH3. G1= 3000 kg/h m², Ls= 2500 kg/h m². Tower is maintained at 25°C and 1 atm pressure. Find NTU and height of the tower. The equilibrium relation is given by y*= 0.98x, where x and y are mole fraction units. KGa= 65 kmol/h m³ atm.
Water- dioxane solution is to be separated by extraction process using benzene as solvent. At 25°C the equilibrium distribution of dioxane between water and benzene is as follows: Wt % of dioxane in water 5.1 18.9 25.2 Wt % of dioxane in benzene 5.2 22.5 32.0 At these concentrations water and benzene are substantially insoluble. 1000 kg of a 25% dioxane water solution is to be extracted to remove 95% of dioxane. The benzene is dioxane free. Calculate minimum solvent required in kg/ hr if the extraction is done in countercurrent fashion. Estimate the number of stages needed if 1.5 times the minimum amount of solvent is used.
Calculate the rate of diffusion of acetic acid (A) across a film of non-diffusing water (B) solution 2 mm thick at 17°C, when the concentration on the opposite sides of the film are 9% and 3% acid (by weight). The diffusivity of acetic acid in the solution is 0.95*10⁻⁹ m²/sec. Density of 9% and 3% by weight acid are 1012 kg/ m³ and 1003 kg/m³ respectively.
Explain the concept of Equilateral –Triangular Coordinates in liquid liquid extraction.
Mention different types of packing for gas absorption operation and their selection criterion.
Calculate the yield of MgSO4*7H2O crystals when 1000 kg saturated solution of MgSO4 at 353 K (80°C) is cooled to 303 K (30°C), assuming 10 % of the water is lost by evaporation during cooling. Solubility of MgSO4 at 353 K (80°C) = 64.2 kg / 100 kg water Solubility of MgSO4 at 303 K (30°C) = 40.8 kg / 100 kg water Atomic weight: Mg=24, S=32, O=16, H=1
What is leaching? What are the industrial applications of leaching? Discuss the different types of equilibrium diagram for leaching
Questions repeat across sessions. Working through two or three papers shows you which topics GTU asks most.
BE Chemical
Send this paper to your class group. Every question has its own link.
Official Gujarat Technological University (GTU) examination paper for Mass Transfer Operations I (Summer 2023, B.E. · Chemical Engineering, Sem 5). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.
Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.
3150501 Mass Transfer Operations I
Official GTU PDF · Summer 2023
The PDF could not be loaded from the university's website.
Open the PDF directly