Consider the diffusion of water vapor through a polypropylene (PP) sheet 2 mm thick. The pressures of H2O at the two faces are 2 kPa and 9 kPa, which are maintained constant. Assuming conditions of steady state, what is the diffusion flux, in [(cm3 STP)/cm2-s], at 298 K?Click here to access Table 6.4.J =_____________(cm3 STP)/cm2-s Table 6.4 Permeability Coefficient PM at 25°C for Oxygen, Nitrogen, Carbon Dioxide, and Water Vapor in a Variety of PolymersРм[x10¬13 (cm³ STP)(cm)/(cm²s-Pa)]PolymerAcronym02N2CO2H20Polyethylene (low density)LDPE2.20.739.568Polyethylene (high density)HDPE0.30О.110.279.0PolypropylenePP1.20.225.438Poly(vinyl chloride)PVC0.0340.00890.012206PolystyrenePS2.00.597.9840Poly(vinylidene chloride)PVDC0.00250.000440.0157.0Poly(ethylene terephthalate)PET0.0440.0110.23Poly(ethyl methacrylate)РЕМА0.89О.173.82380

Answered: Consider the diffusion of water vapor…

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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Consider the diffusion of water vapor through a polypropylene (PP) sheet 2 mm thick. The pressures of H₂O at the two faces are 2 kPa and 9 kPa, which are maintained constant. Assuming conditions of steady state, what is the diffusion flux, in [(cm³ STP)/cm²-s], at 298 K?

Click here to access Table 6.4.

J =

_____________

(cm³ STP)/cm²-s