7 A spherical ball of solid, nonporous naphthalene, a "moth- ball," is suspended in still air. The naphthalene ball slowly sublimes, releasing the naphthalene vapor into the surrounding air by molecular diffusion-limited process. Estimate the time required to reduce the diameter from 2.0 to 0.50 cm when the surrounding air is at 347 K and 1.0 atm. Naphthalene has a molecular weight of 128 g/mol, a solid density of 1.145 g/cm³, and a diffusivity in air of 8.19 x 10-6 m²/s, and exerts a vapor pressure of 5.0 Torr (666 Pa) at 347 K.
7 A spherical ball of solid, nonporous naphthalene, a "moth- ball," is suspended in still air. The naphthalene ball slowly sublimes, releasing the naphthalene vapor into the surrounding air by molecular diffusion-limited process. Estimate the time required to reduce the diameter from 2.0 to 0.50 cm when the surrounding air is at 347 K and 1.0 atm. Naphthalene has a molecular weight of 128 g/mol, a solid density of 1.145 g/cm³, and a diffusivity in air of 8.19 x 10-6 m²/s, and exerts a vapor pressure of 5.0 Torr (666 Pa) at 347 K.
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:7 A spherical ball of solid, nonporous naphthalene, a "moth-
ball," is suspended in still air. The naphthalene ball slowly
sublimes, releasing the naphthalene vapor into the surrounding
air by molecular diffusion-limited process. Estimate the time
required to reduce the diameter from 2.0 to 0.50 cm when the
surrounding air is at 347 K and 1.0 atm. Naphthalene has a
molecular weight of 128 g/mol, a solid density of 1.145 g/cm³,
and a diffusivity in air of 8.19 x 10-6 m²/s, and exerts a vapor
pressure of 5.0 Torr (666 Pa) at 347 K.
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