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(d) A continues stream of humid air contains water vapor and dry air, the latter containing approximately 21 mole % O2 and 79% N₂. Write expression for the molar flow rate of O₂ and for the mole fraction of H₂O and O₂ in the gas in terms of ri, (lb-mole H₂O/s) and ri₂ (lb-mole dry air/s). (e) The product from a batch reactor contains NO, NO2 and N₂O4. The mole fraction of NO is 0.400. Write an expression for the gram-moles of N₂O4 in terms of n(mol mixture) and YNO2 (mol NO₂/mol).

(d) A continues stream of humid air contains water vapor and dry air, the latter containing approximately 21 mole % O2 and 79% N₂. Write expression for the molar flow rate of O₂ and for the mole fraction of H₂O and O₂ in the gas in terms of ri, (lb-mole H₂O/s) and ri₂ (lb-mole dry air/s). (e) The product from a batch reactor contains NO, NO2 and N₂O4. The mole fraction of NO is 0.400. Write an expression for the gram-moles of N₂O4 in terms of n(mol mixture) and YNO2 (mol NO₂/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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Part D/E
CHENG 111 Tutorial Sheet (Chapter 4) 3 4.4 Draw and label the given streams and derive expression for the indicated quantities in terms of labeled variables. The solution of Part (a) is given as an illustration. (a) A continues stream contains 40.0 mole% benzene and the balance toluene. Write expression for the molar and mass flow rates of benzene, rig (mol C6H6/s), in term of the total molar flow rate of the stream, n (mol/s). (b) The feed to a batch process contains equimolar quantities of nitrogen and methane. Write an expression for the kilograms of nitrogen in term of the total moles n(mol) of this mixture. (c) A stream containing ethane, propane, and butane has a mass flow rate of 100.0 g/s. Write an expression for the molar flow rate of ethane, ng (lb- mole C₂H6/h), in terms of the mass fraction of this species, XE. (d) A continues stream of humid air contains water vapor and dry air, the latter containing approximately 21 mole% O2 and 79% N2. Write expression for the molar flow rate of O₂ and for the mole fraction of H₂O and O₂ in the gas in terms of ri, (lb-mole H₂O/s) and ri2 (lb-mole dry air/s). (e) The product from a batch reactor contains NO, NO2 and N₂O4. The mole fraction of NO is 0.400. Write an expression for the gram-moles of N₂O4 in terms of n(mol mixture) and YNO2 (mol NO₂/mol).
Transcribed Image Text:CHENG 111 Tutorial Sheet (Chapter 4) 3 4.4 Draw and label the given streams and derive expression for the indicated quantities in terms of labeled variables. The solution of Part (a) is given as an illustration. (a) A continues stream contains 40.0 mole% benzene and the balance toluene. Write expression for the molar and mass flow rates of benzene, rig (mol C6H6/s), in term of the total molar flow rate of the stream, n (mol/s). (b) The feed to a batch process contains equimolar quantities of nitrogen and methane. Write an expression for the kilograms of nitrogen in term of the total moles n(mol) of this mixture. (c) A stream containing ethane, propane, and butane has a mass flow rate of 100.0 g/s. Write an expression for the molar flow rate of ethane, ng (lb- mole C₂H6/h), in terms of the mass fraction of this species, XE. (d) A continues stream of humid air contains water vapor and dry air, the latter containing approximately 21 mole% O2 and 79% N2. Write expression for the molar flow rate of O₂ and for the mole fraction of H₂O and O₂ in the gas in terms of ri, (lb-mole H₂O/s) and ri2 (lb-mole dry air/s). (e) The product from a batch reactor contains NO, NO2 and N₂O4. The mole fraction of NO is 0.400. Write an expression for the gram-moles of N₂O4 in terms of n(mol mixture) and YNO2 (mol NO₂/mol).
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