Water in the bottom of narrow tube is held at constant temperature of 293 K. The total pressure of air (assumed dry) is 1.0132 x 105Pa and the temperature is 293 K Water evaporates and diffuses through the air in the tube and the diffusion path z2-z1 is 0.1524m long. Calculate the rate of evaporation at steadystate in kg mol/m2s. The diffusivity of water vapor at 293 K and 1 atm pressure is 0.250 x 10-4 m2/s. Assume the system is under isothermal condition.

Q: A meat processing industry has a cold room for handling products whose outer wall is coated with a…

A: Given data: Temperature of air = 5 0C %RH = 60 % Dimension of wall = 3 m × 2 m Thickness of…

Q: For steady state diffusion of a gas in a stagnant layer of another gas, the concentration decreases…

A: The way in decrease in concentration of the gas in stagnant layer is to be mentioned.

Q: Which of the followings is not a part of "steady state diffusion" process? a) Diffusion flux b)…

A:

Q: Two bulbs are connected by a straight tube, 0.001 m in diameter and 0.15 m in length. Initially the…

A:

Q: For the carburizing process of the titanium plate, the temperature of which needs to be heated to a…

A: To determine the below conditions, we will use the error function. This is denoted by "erf". This is…

Q: A gas mixture containing nitrogen is refractory with an inner radius (R1) of 4 cm and an outer…

A: The diffusivity of Nitrogen gas = 2×10-4m2/s radius of the inner radius of the shell R1 = 4cm The…

Q: A cylindrical tube connects two large gas tanks (Tank-1 and 2). Both tanks contain mixture of carbon…

A: Given: The partial pressure of the first tank, The partial pressure of the second tank, The length…

Q: A situation arises where steady state equimolar counter diffusion is occurring in a section of…

A: The molecular diffusivity of the given system for equimolar counter diffusion is to be calculated.

Q: Identity of the salt: NaCl a. Mass of salt [g] b. Molar Mass of salt [g/mol] c. Moles of salt [mol]…

A: (a) Change in temperature =? For trial 1, the initial temperature is Ti = 20.9oC, and the final…

Q: A dilute solution of solute A in solvent B is passed through a tubular-membrane separator, where the…

A:

Q: Estimate the liquid phase diffusion coefficient for the following systems at 25oC: 1. Toluene in…

A: Note: We are authorized to answer three subparts at a time, since you have not mentioned which part…

Q: Knowing that the diameter of the NO gas molecule is 459 pm, determine the viscosity and the…

A:

Q: In the mass transport theory, the mass flux j is generally given as, j = -pDVw Show that for a…

A:

Q: 23.) Nitrogen gas concentration across a 2 mm thick palladium sheet changes by 4 kg/m°. Considering…

A: Given data: Thickness of palladium sheet = 2 mm Concentration change of N2 gas across the palladium…

Q: By analyzing the free-energy change resulting from partitioning in an aqueous two-phase extraction,…

A: For a globular protein, the interface is between the protein sphere and the liquid phase for the…

Q: 1. A sheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200°C and is permitted…

A: Thickness of sheet = 1.5 mm Diffusion coefficient of nitrogen in steel =  Diffusion flux =…

Q: A very large tank is made of FCC iron sheet. Hydrogen is stored inside the tank at 900 ° C. Due to…

A: Given Wall thickness ∆t=5 mm Area A= 5 m2 Time t=90 days Hydrogen concentration on inner…

Q: Distillation uses thermal energy as a separating agent. O True False QUESTION 4 For a medium moving…

A: Separating agent: Is the addition of heat to facilitate the separation of two chemical species.…

Q: The effective use of a drug is achieved by its controlled release, and film-coated  pellets,…

A: Given: The effective use of a drug is achieved by its controlled release, and film-coated  pellets,…

Q: Calculate the diffusion coefficient of naphthalene in air at 25C and 1 bar.

A: The speed at which one substance will diffuse through another is determined by its diffusion…

Q: 1. Heating of a Spherical Particle Consider a solid spherical particle of radius R and thermal…

A: First consider a sphere of radius R and the thermal diffusivity α Now to get governing equation for…

Q: When both solute and solvent are liquid, the diffusion coefficient has higher values ​​than in…

A: Given: When both solute and solvent are liquid, the diffusion coefficient has higher values ​​than…

Q: Corrugated surfaces such as those shown schematically in the figure below are commonly encountered…

A: Given that x=aL-zL the concentration of species =C the reaction is of the first order and takes…

Q: For a steady condition with constant properties and for one dimensional 2² T 1 ƏT the general form…

A: tHE HEAT DIFFUSION EQUATION IS IN THE FORM OF:  d2Tdx2 +d2Tdy2 +d2Tdz2 = 1α dTdt  For one…

Q: 7. Overall liquid mass transfer coefficient, represent the transfer from a) Equilibrium liquid…

A: It is required to determine which one of the mass transfer from the given options is represented by…

Q: A 4 mm diameter tube, 40 cm long, closed at one end and standing vertically on its closed end, is…

A:

Q: consider diffusion of a drug across a two-layer membrane mounted in between two compartments (donor…

A: To calculate the flux of the drug from the donor to the receiver chamber, we can use Fick's first…

Q: The diffusion of a species in a mixture happens because (A None of the choices B there is a reaction…

A: Diffusion is the phenomena of mass transfer between two points by virtue of some driving force which…

Q: Carbon is diffused on the surface of a steel plate by carburization heat treatment. Steel contains…

A: Given data: Steel contains 0.20% carbon carburization process is applied at 1000oC in methane gas…

Q: Pure hydrogen gas travels across a 7 mm thick vulcanised neoprene rubber slab at a pressure of…

A: Given data: Thickness of rubber slab = 7 mm Pressure of hydrogen gas= 202.65 kPa Temperature = 300 K…

Q: Oxygen gas is most soluble in water under which set of conditions? A. Low temperature, low…

A: Oxygen gas is most soluble in water at high pressure and low temperature       Option C is correct

Q: ) To provide a diffusion barrier that prevents reactions between nickel and tantalum, a layer of…

A: Given data: Flux of nickel atoms = 1.574 × 1012 atoms/cm2.s Diffusivity of nickel ions in MgO= 4 ×…

Q: A sheet of steel 1.9mm thick has nitrogen atmospheres on both sides and is permitted to achieve a…

A: Given that  thickness = 1.9 mm DAB = 7.55 X 10-11 m2/s diffusion flux ,JA =1.5 x 10-7 kg/m2s CA =…

Q: A cylindrical tube connects two large gas tanks (Tank-1 and 2). Both tanks contain mixture of carbon…

A: Given Data  The cylindrical tube connects two large tanks (Tank 1 and 2). The tanks contain CO2 and…

Q: A sheet of steel 1.5mm thick has nitrogen atmospheres on both sides and is permitted to achieve a…

A: Given that  thickness = 1.5 mm  DAB = 6.05 X 10-11m2s JA = 1.5 x 10-7kgm2sCA = 4.97CB = 2.5 kg/m3

Q: 6. Problem setups. Let's consider two cases of diffusion. On the left, we have cells embedded in a…

A: Given:Concentration of Oxygen