) (10 Pts.) The solute HC1 is diffusing through a film of water 2 mm thick at 100°C. Theconcentration of HCL at one boundary of the film is 12 wt% HCl (p=1.060 g/ml), at the otherboundary it is 6 wt% HC1 (p=1.060 g/ml). The diffusion coefficient of HCl in water is 0.09cm²/h. Calculate the flux of HCl in kgmol/m² assuming that one boundary is impermeable towater.

In this system A is diffusing through non diffusing B. The state of system is steady state. Fick's…

Answered: (10 Pts.) The solute HCI is diffusing…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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A long glass capillary with a diameter of 0.1 cm is in contact with water on one side and dry air on the other. Water vapor evaporates from the side in contact with water and diffuses through the capillary to the other side. Using the following given data, calculate the rate at which water evaporates in this system in [g/s].Isothermal diffusion (20℃)Vapor pressure of water 17.5 mmHg (20℃)Water diffusivity 0.3 cm2/s (20℃)Dry air pressure 760 mmHgDural length 10 cmGas constant R=82 cm3atm/mol K18 g/mol molecular weight of water
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.
A quiescent body of water has a depth of 600 mm. The DO level at the bottom after 16 days is 3.5 mg/l when the surface is exposed to the atmosphere at a temperature of 25oC. Determine the DO of the water body. The saturated DO at 25oC is 8.5 mg/l and the diffusion coefficient (kd) at 25oC is 2.5 x 10-3 mm2/s.
28.21 A 1 x 10-2 m spherical pellet is sprayed with a very thin coat of paint. The paint contains a volatile solvent. To dry the pellet, a 300 K and 1.013 × 105 Pa air stream flows around it with a bulk velocity of 1 m/s. The estimated loading of the solvent in the wet paint is 0.12 g solvent/cm³. Physical properties are vapor pressure of the solvent = 1.27 x 104 Pa mass diffusivity of solvent in air = 9.62 x 10-6 m²/s kinematic viscosity of air density of air = 1.569 x 10-5 m²/s = 1.177 kg/m³ thermal conductivity of air thermal diffusivity of air heat capacity of air = 2.624 x 10-2 J/m.s. K = 2.216 x 10-5 m²/s = 1.006 J/g. K = 78 g/g mole molecular weight of the solvent Use the McAdam's¹¹ equation Nu = 0.37(Redp) 0.6 (Pr) 1/3, where Redp dp vx V to evaluate (a) the heat-transfer coefficient, h; (b) the mass-transfer coefficient, ke; (c) the molar flux of the solvent into the air stream.
calculate the boiling point of a solution of 400.0 g of ethylene glycol dissolved in 400 g of water
A spherical mothball initially with radius, Ro, is shrinking in volume due to the sublimation of naphthalene through the air in a large room. At room temperature (T) and pressure (PT), the naphthalene (with molecular weight as MWa) in the mothball exerts a vapor pressure (VPa). It is of interest to investigate the rate at which the mothball is shrinking due to the diffusion of naphthalene in an air-rich environment. A. Illustrate the physical model/s that can describe the diffusion of naphthalene through the air-rich environment (room). Indicate the control volume/s (differential volume/s) as an expression of the transfer area and distance. Specify the components needed in establishing the shell balance. Indicate the boundary conditions and illustrate the direction of transfer in each physical model. Note: Express the radial distance from the mothball surface as r, while the shrinking radius of the mothball is expressed as R. Use and define subscripts, as necessary. B. For each…
A quiescent body of water has a depth of 600 mm. The DO level at the bottom after 16 days is 3.5 mg/l when the surface is exposed to the atmosphere at a temperature of 25o Determine the DO of the water body. The saturated DO at 25oC is 8.5 mg/l and the diffusion coefficient (kd) at 25oC is 2.5 x 10-3 mm2/s.
A steel sheet is exposed to a nitrogen rich atmosphere at 900°C and achieves steady-state diffusion. The diffusion coefficient for nitrogen at this temperature is 1.85 x 10-10 m2 kg and the diffusion flux is 1.0 x 10-7 If the initial concentration of sec m².sec kg nitrogen in the steel at the high-pressure surface is 2 at what distance into the sheet m39 will the concentration of nitrogen be 0.5 *9? m3 4 360 words D Focus 255% e Type here to search IA 5:02 PM W 2/24/2022 10 165HZ V WQHD |. ROG ZEPHYRUS 100% DCI-P3 PANTONE Validated F5 F9 F10 ESC AURA DELETE %24 & %3D P www ENT G K

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