Water in the bottom of a narrow metal tube is held at a constant temperature of 35°C. The total pressureof air (assumed dry) is 1 atm and the temperature is 35°C. Water evaporates and diffuses through the airin the tube, and the diffusion path is 0.22 m long. The diffusivity of water vapor at 35°C and 1 atmpressure is 0.292 x 10-4 m2/s. Assume that the system is isothermal.Estimate the rate of evaporation at steady state in kg mol/s m2NDP-(Pa-Pa2)RT(=, -)P M Estimate the diffusivity of acetone in water at 35 and 55 °C using the Wilke-Chang equation. Theexperimental value is 1.28 x 10-9 m2/s at 25°C (298 K).DAB = 1.173x10-1(AM,)%06

Given that T = 35 CP = 1 atm Z = 0.22 m DAB = 0.292 x 10-4 m2 /s According to bartleby rule ,I…

Answered: Water in the bottom of a narrow metal…

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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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?
QUESTION 1 Match the following terms to the correct definition. Sublimation Dipole-dipole attraction Adhesive force Viscosity Intermolecular force Dispersion force Surface tension Phase diagram A. force of attraction between molecules of different chemical identities B. "noncovalent attractive force between atoms, molecules, and/or ions" C. intermolecular attraction between two permanent dipoles D. "energy required to increase the area, or length, of a liquid surface by a given amount" E. "attraction between two rapidly fluctuating, temporary dipoles; significant only when particles are very close together" F. measure of a liquid s resistance to flow G. pressure-temperature graph summarizing conditions under which the phases of a substance can exist H. change from solid state directly to gaseous state
2. The wall of a furnace is made up of a material which has thermal conductivity of 1.65 W/m•C and a thicknesses 250 mm. The inner side of the furnace wall is exposed to hot gases at 1000 °C with a convection coefficient of 25 W/m2°C and the inside the surface is at 800 °C. The air outside the furnace is at 25°C with a convection coefficient of 12 W/m2°C. a. Draw a clear diagram representing the system b. Determine the temperature of the outside surface of the furnace C. The rate of heat loss from the furnace.

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