K) and press. 1 atm. The diffusion path (0.03 m) long and the KG is (4.632*10*: Ammonia gas diffuse through a stagnant layer of nitrogen at a constant temp. (300nitrogen layer are PAI=0.7 atm, PA2=0.1 atm. Derive the equation for this casekmol/ cm.s. press.). The partial press. of Ammonia gas on the two sides ofacmand calculate the rate of diffusion and find K.

Given T=300 K P=1 atm Z=0.03 m Kg=4.632 x 10-1 kmolm2s.press. PA1=0.7 PA2=0.1

Answered: K) and press. 1 atm. The diffusion path…

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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7
17.29 An engineered tissue system consists of a slice of cell mass immobilized on a scaffold measuring 5 cm in length and 0.5 cm in thickness. The top face of the tissue scaffold is exposed to water, dissolved oxygen, and organic nutrients maintained at 30 C. The bottom face of the tissue is thermally insulated. At present, the specific oxygen consumption of the tissue mass is 0.5 mmol O₂/cm³cells-hr, and from respiration energetics, the energy released by respiration is 468 J/mmol O₂ consumed. We are interested in knowing the temperature at the bottom face of the tissue next to the insulated boundary. If this temperature remains below 37 C, the tissue will not die. The thermal conductivity of the tissue scaffold is k = 0.6 W/m. K. a. Using the information given predict the temperature profile within the tissue slab the slab. b. C. What is the heat generated per unit volume of tissue? Estimate the temperature at x =L (the insulated boundary).
Consider the problem of how plants might lift water from ground level to their leaves. Assume that there us a semipermeable membrane at the roots, with pure water on the outside, and an ideal solution inside a small cylindrical capillary inside the plant. The solute mole fraction inside the capillary is x = 0.001. The radius of the capillary is 0.1 mm. Assuming the density of the solution = 1 g/mL, what is the height of the solution at 298 K? Can osmotic pressure account for raising this water?
5. Solar ponds are small artificial lakes used to store solar energy. The rise of heated (and thus less dense) water to the surface is prevented by adding salt at the pond bottom. In a typical salt gradient solar pond, the density of water increases in the gradient zone, as shown. For H 4 m, po 1040 kg/m³, and a thickness of 0.8 m for the surface zone, calculate the gauge pressure at the bottom of the gradient zone. V S Sun = = H=4m = Surface zone Po 1040 kg/m³ Increasing salinity and density Gradient zone Storage zone - (2 Po=1040 kg/m P= Po(1+35+5²)
Problem 4.1: Vapour pressures for water and hex- ane droplets with the Kelvin equation What is the increase in vapour pressure (over that of a flat surface) for droplets of water and n-hexane at 20 °C? What do you observe? For which liquid is the effect more pronounced and why? Make an application for the following radii values: 107, 10, 10" and 0.5 x 10 m. The physical data for water and n-hexane, which are required, are given in the following table: Liquid volume (cm' mol") Liquid Surface tension (mN m) Water 72.8 18.0 n-Hexane 18.4 130
Problem1.28 g of a powder of particle density 2500 kg/m3 are charged into the cell of an apparatus for measurement of particle size and specific surface area by permeametry. The cylindrical cell has a diameter of 1.14 cm and the powder forms a bed of depths 1 cm. The dry air of density 1.2 kg/m3 and viscosity 18.4 x 10-6 Pa-s flows at a rate of 36 cm3/min through the powder (in a direction parallel to the axis of the cylindrical cell) and producing a pressure difference of 100 mm of water across the bed. Determine the surface-volume mean diameter and the specific surface of the powder sample.
At about what pressure would the mean free path of an air molecule at room temperature equal 10 em, the size of a typical laboratory apparatus?
5
-The wall of a building is a composite consisting of a 100-mm layer of common brick, a 100-mm layer of glass fiber(paper faced. 28kg/m2), a 10-mm layer of gypsum plaster (vermiculite), and a 6-mm layer of pine panel. If the inside convection coefficient is 10W/m2.K and the outside convection coefficient is 70W/m2.K, what are the total resistance and the overall coefficient for heat transfer?
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