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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
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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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
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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