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A gaseous fuel containing methane (CH₂) and ethane (C₂H.) is burned with excess air. The combustion reactions are shown below. The fuel enters the furnace at 25 °C and 1 atm, and the air enters at 200 °C and 1 atm. 100 mol of stack gas containing 5.321 % mol CO₂, 1.596 % mol CO, 7.317 % mol O₂, 12.239 mol % H₂O and the balance N₂ leaves the furnace at 800 °C a. Calculate the heat (kJ) transferred from the furnace. (-2765 kJ) b. If O₂ rather than air was fed to the furnace, would the exit gas temperature be higher, lower or the same? Give your reason.

A gaseous fuel containing methane (CH₂) and ethane (C₂H.) is burned with excess air. The combustion reactions are shown below. The fuel enters the furnace at 25 °C and 1 atm, and the air enters at 200 °C and 1 atm. 100 mol of stack gas containing 5.321 % mol CO₂, 1.596 % mol CO, 7.317 % mol O₂, 12.239 mol % H₂O and the balance N₂ leaves the furnace at 800 °C a. Calculate the heat (kJ) transferred from the furnace. (-2765 kJ) b. If O₂ rather than air was fed to the furnace, would the exit gas temperature be higher, lower or the same? Give your reason.

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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A gaseous fuel containing methane (CH₂) and ethane (C₂H) is burned with excess air. The combustion reactions are shown below. The fuel enters the furnace at 25 °C and 1 atm, and the air enters at 200 °C and 1 atm. 100 mol of stack gas containing 5.321 % mol CO₂, 1.596 % mol CO, 7.317 % mol O₂, 12.239 mol % H₂O and the balance N₂leaves the furnace at 800 °C a. Calculate the heat (kJ) transferred from the furnace. (-2765 kJ) b. If O₂ rather than air was fed to the furnace, would the exit gas temperature be higher, lower or the same? Give your reason.
Transcribed Image Text:A gaseous fuel containing methane (CH₂) and ethane (C₂H) is burned with excess air. The combustion reactions are shown below. The fuel enters the furnace at 25 °C and 1 atm, and the air enters at 200 °C and 1 atm. 100 mol of stack gas containing 5.321 % mol CO₂, 1.596 % mol CO, 7.317 % mol O₂, 12.239 mol % H₂O and the balance N₂leaves the furnace at 800 °C a. Calculate the heat (kJ) transferred from the furnace. (-2765 kJ) b. If O₂ rather than air was fed to the furnace, would the exit gas temperature be higher, lower or the same? Give your reason.
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