A sphere of naphthalene having a radius of 1.5 mm is suspended in a large volume of still air at 320 K and 101.325 kPa. The surface temperature of the naphthalene can be assumed to be at 320 K and its vapor pressure at this temperature is 0.342 mmHg. The diffusivity (DAB) of naphthalene in air is 7.32x10“ m²/s, calculate: 1- The mass flux for dilute naphthalene from the surface 2- Then find the partial pressure of naphthalene at a distance 31 mm from the surface of the naphthalene sphere. Assume steady – state diffusion.
A sphere of naphthalene having a radius of 1.5 mm is suspended in a large volume of still air at 320 K and 101.325 kPa. The surface temperature of the naphthalene can be assumed to be at 320 K and its vapor pressure at this temperature is 0.342 mmHg. The diffusivity (DAB) of naphthalene in air is 7.32x10“ m²/s, calculate: 1- The mass flux for dilute naphthalene from the surface 2- Then find the partial pressure of naphthalene at a distance 31 mm from the surface of the naphthalene sphere. Assume steady – state diffusion.
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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Transcribed Image Text:A sphere of naphthalene having a radius of 1.5 mm is suspended in a large volume of
still air at 320 K and 101.325 kPa. The surface temperature of the naphthalene can be
assumed to be at 320 K and its vapor pressure at this temperature is 0.342 mmHg. The
diffusivity (DAB) of naphthalene in air is 7.32x10“ m²/s, calculate:
1- The mass flux for dilute naphthalene from the surface
2- Then find the partial pressure of naphthalene at a distance 31 mm from the surface of
the naphthalene sphere. Assume steady – state diffusion.
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