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
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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Basic Principles of Chemical Engineering Question
Solve this problem while do not use ΔĤr 0 and use Heat of Formation.
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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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