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EX: The standard heat of reaction for the oxidation of ammonia is given below: 4 NH3(g) + 5 O2(g) 4 NO(g) + 6 H2O(v): AĤ? = -904.7 kJ/mol One hundred mol NH3/s and 200 mol O2/s at 25°C are fed into a reactor in which the ammonia is completely consumed. The product gas emerges at 300°C. Calculate the rate at which heat must be transferred to or from the reactor, assuming operation at approximately 1 atm. Solution: (100 mol NH3/s {200 mo! O2/s 25°C If ammonia is completely consumed then the product flow rate will be as follows: NNH3 = NNH3,0 45 0= 100 – 4§ } = 25 NH20 = NH20,0 + 65 NH20 = 0 + 6(25) no2 no2,0 55 NNo = NNo + 45 no = 200 – 5x25 = 75 mol/s nNo = 0 + 4(25)=100 mol/s = 150 mol/s

EX: The standard heat of reaction for the oxidation of ammonia is given below: 4 NH3(g) + 5 O2(g) 4 NO(g) + 6 H2O(v): AĤ? = -904.7 kJ/mol One hundred mol NH3/s and 200 mol O2/s at 25°C are fed into a reactor in which the ammonia is completely consumed. The product gas emerges at 300°C. Calculate the rate at which heat must be transferred to or from the reactor, assuming operation at approximately 1 atm. Solution: (100 mol NH3/s {200 mo! O2/s 25°C If ammonia is completely consumed then the product flow rate will be as follows: NNH3 = NNH3,0 45 0= 100 – 4§ } = 25 NH20 = NH20,0 + 65 NH20 = 0 + 6(25) no2 no2,0 55 NNo = NNo + 45 no = 200 – 5x25 = 75 mol/s nNo = 0 + 4(25)=100 mol/s = 150 mol/s

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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EX: The standard heat of reaction for the oxidation of ammonia is given below: 4 NO(g) + 6 H-0(V): ДНР -904.7 kJ/mol %3D 4 NH3(g) + 5 O2(g) One hundred mol NH3/s and 200 mol O2/s at 25°C are fed into a reactor in which the ammonia is completely consumed. The product gas emerges at 300°C. Calculate the rate at which heat must be transferred to or from the reactor, assuming operation at approximately 1 atm. Solution: 100 mol NH3/s 200 mo! 02/s 25°C If ammonia is completely consumed then the product flow rates will be as follows: NNH3 = NNH3,0 45 0= 100 – 45 } = 25 NH20,0 + 65 Пн20 3 0 + 6(25) — 150 тol/s NH20 no2 no20 - 55 NNo = NNo + 4} 75 тol/s NNo = 0+ 4(25)=100 mol/s = 200 – 5x25 = noz
Transcribed Image Text:EX: The standard heat of reaction for the oxidation of ammonia is given below: 4 NO(g) + 6 H-0(V): ДНР -904.7 kJ/mol %3D 4 NH3(g) + 5 O2(g) One hundred mol NH3/s and 200 mol O2/s at 25°C are fed into a reactor in which the ammonia is completely consumed. The product gas emerges at 300°C. Calculate the rate at which heat must be transferred to or from the reactor, assuming operation at approximately 1 atm. Solution: 100 mol NH3/s 200 mo! 02/s 25°C If ammonia is completely consumed then the product flow rates will be as follows: NNH3 = NNH3,0 45 0= 100 – 45 } = 25 NH20,0 + 65 Пн20 3 0 + 6(25) — 150 тol/s NH20 no2 no20 - 55 NNo = NNo + 4} 75 тol/s NNo = 0+ 4(25)=100 mol/s = 200 – 5x25 = noz
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