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• Calculate the time required for 80% sublimation of a sphere of naphthalene (diameter : 15mm) in air if a 4mm thick stagnant air film surrounds the sphere. • Given: Temperature is 35°C and pressure is 1 atm. Diffusivity under the given conditions is 0.0892 cm/s, Density of solid naphthalene is 1140 kg/m³ and mol wt 128 Vapour pr. At 35°C is 0.4303 mm Hg Gas constant 82.1 m.atm.K1.mol

• Calculate the time required for 80% sublimation of a sphere of naphthalene (diameter : 15mm) in air if a 4mm thick stagnant air film surrounds the sphere. • Given: Temperature is 35°C and pressure is 1 atm. Diffusivity under the given conditions is 0.0892 cm/s, Density of solid naphthalene is 1140 kg/m³ and mol wt 128 Vapour pr. At 35°C is 0.4303 mm Hg Gas constant 82.1 m.atm.K1.mol

Introduction to Chemical Engineering Thermodynamics
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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Self Assessment Exercise • Calculate the time required for 80% sublimation of a sphere of naphthalene (diameter : 15mm) in air if a 4mm thick stagnant air film surrounds the sphere. • Given: Temperature is 35°C and pressure is 1 atm. Diffusivity under the given conditions is 0.0892 cm²/s, Density of solid naphthalene is 1140 kg/m³ and mol wt 128 Vapour pr. At 35°C is 0.4303 mm Hg Gas constant 82.1 m³.atm.K1.mol Ans: 91.7 hours
Transcribed Image Text:Self Assessment Exercise • Calculate the time required for 80% sublimation of a sphere of naphthalene (diameter : 15mm) in air if a 4mm thick stagnant air film surrounds the sphere. • Given: Temperature is 35°C and pressure is 1 atm. Diffusivity under the given conditions is 0.0892 cm²/s, Density of solid naphthalene is 1140 kg/m³ and mol wt 128 Vapour pr. At 35°C is 0.4303 mm Hg Gas constant 82.1 m³.atm.K1.mol Ans: 91.7 hours
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