Chemical Engineering Principles Q1. An industrial-strength drain cleaner contains 5 kg of water (MW=18) and 5 kg of NaOH (MW-40). What are the mass fractions and mole fractions of each component in the drain cleaner container? Q3. An open bowl 0.2 m in diameter contains water at 350 K evaporating into the atmosphere. If the currents are sufficiently strong to remove the water vapor as it is formed and if the resistances to its mass transfer in air is equivalent to that of a 2 mm layer for condition of molecular diffusion, what will be the rate of evaporation? Diffusivity is 0.2 cm2/s, vapor pressure is 41.8 kN/m2. Q4. Sulphur dioxide is absorbed from air into water in a packed absorption tower. At a certain location in the tower, the mass transfer flux is 0.027 kmol SO2/m²h and the liquid phase concentrations in mole fraction are 0.0025 and 0.0003 respectively at the two-phase interface and in the bulk liquid. If the diffusivity of SO2 in water is 1.7 x 10-9 m²/s, determine the mass transfer coefficient, kc and film thickness.
Chemical Engineering Principles Q1. An industrial-strength drain cleaner contains 5 kg of water (MW=18) and 5 kg of NaOH (MW-40). What are the mass fractions and mole fractions of each component in the drain cleaner container? Q3. An open bowl 0.2 m in diameter contains water at 350 K evaporating into the atmosphere. If the currents are sufficiently strong to remove the water vapor as it is formed and if the resistances to its mass transfer in air is equivalent to that of a 2 mm layer for condition of molecular diffusion, what will be the rate of evaporation? Diffusivity is 0.2 cm2/s, vapor pressure is 41.8 kN/m2. Q4. Sulphur dioxide is absorbed from air into water in a packed absorption tower. At a certain location in the tower, the mass transfer flux is 0.027 kmol SO2/m²h and the liquid phase concentrations in mole fraction are 0.0025 and 0.0003 respectively at the two-phase interface and in the bulk liquid. If the diffusivity of SO2 in water is 1.7 x 10-9 m²/s, determine the mass transfer coefficient, kc and film thickness.
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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Please solve the first, third and fourth questions by explaining how to solve them in steps
Transcribed Image Text:Chemical Engineering Principles
Q1. An industrial-strength drain cleaner contains 5 kg of water (MW=18) and 5 kg of NaOH (MW-40). What
are the mass fractions and mole fractions of each component in the drain cleaner container?
Q3. An open bowl 0.2 m in diameter contains water at 350 K evaporating into the atmosphere. If the currents
are sufficiently strong to remove the water vapor as it is formed and if the resistances to its mass transfer in air
is equivalent to that of a 2 mm layer for condition of molecular diffusion, what will be the rate of evaporation?
Diffusivity is 0.2 cm2/s, vapor pressure is 41.8 kN/m2.
Q4. Sulphur dioxide is absorbed from air into water in a packed absorption tower. At a certain location in the
tower, the mass transfer flux is 0.027 kmol SO2/m²h and the liquid phase concentrations in mole fraction are
0.0025 and 0.0003 respectively at the two-phase interface and in the bulk liquid. If the diffusivity of SO2 in
water is 1.7 x 10-9 m²/s, determine the mass transfer coefficient, kc and film thickness.
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