Methane is burned completely with 25% excess air. The fuel and air enter the furnace at 25°C and the flue gases leave at 460 K. Calculate the enthalpy (kJ) and entropy change (kJ/K) of the combustion process per mol CH4 burned. Hint: The computational path involves mixing/unmixing steps. The following are given: AH298.15 = -802.625- AS298.15 -5.306- Mean heat capacities (J/mol-K): Species CO₂ H₂O N₂ 0₂ <Сp>H 41.649 34.153 29.381 30.473 kJ mol CH4 J mol CH4 s 41.377 34.106 29.360 30.405
Methane is burned completely with 25% excess air. The fuel and air enter the furnace at 25°C and the flue gases leave at 460 K. Calculate the enthalpy (kJ) and entropy change (kJ/K) of the combustion process per mol CH4 burned. Hint: The computational path involves mixing/unmixing steps. The following are given: AH298.15 = -802.625- AS298.15 -5.306- Mean heat capacities (J/mol-K): Species CO₂ H₂O N₂ 0₂ <Сp>H 41.649 34.153 29.381 30.473 kJ mol CH4 J mol CH4 s 41.377 34.106 29.360 30.405
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
Related questions
Question
![Methane is burned completely with 25% excess air. The fuel and
air enter the furnace at 25°C and the flue gases leave at 460 K.
Calculate the enthalpy (kJ) and entropy change (kJ/K) of the
combustion process per mol CH4 burned. Hint: The computational
path involves mixing/unmixing steps. The following are given:
AH298.15 = -802.625-
kJ
mol CH4
J
mol CH4
AS298.15 -5.306.
=
Mean heat capacities (J/mol-K):
Species
CO₂
H₂O
N₂
0₂
<Сp>H
41.649
34.153
29.381
30.473
<Cp>s
41.377
34.106
29.360
30.405](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdd1585f7-e8c3-448e-85a6-28a8faf15ecb%2F38315fa6-386d-4a0f-9bd0-abe7ca3b3a6b%2Fu3uch4n_processed.png&w=3840&q=75)
Transcribed Image Text:Methane is burned completely with 25% excess air. The fuel and
air enter the furnace at 25°C and the flue gases leave at 460 K.
Calculate the enthalpy (kJ) and entropy change (kJ/K) of the
combustion process per mol CH4 burned. Hint: The computational
path involves mixing/unmixing steps. The following are given:
AH298.15 = -802.625-
kJ
mol CH4
J
mol CH4
AS298.15 -5.306.
=
Mean heat capacities (J/mol-K):
Species
CO₂
H₂O
N₂
0₂
<Сp>H
41.649
34.153
29.381
30.473
<Cp>s
41.377
34.106
29.360
30.405
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