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2. Methane gas is combusted with air, supplied in 25% excess. Calculate maximum attainable temperature in the combustion chamber. The reacting gas are supplied at 25°C. Air is taken to be 21% 0, and 79% N. The chemical reaction is, CH, + 20, - CO, + 2H,0, Set the reference temperature to be 298 K. Data are available at this temperatu and it is convenient since the reactants are supplied at this temperature. AH°,- 2AH°, (H,O) + AH°, (CO,) - AHº, (CH,) = 2 -241.827 + -393.505 - (- 74.873) - -802.286 kJ/mol Take the energy balance to be based on 1 mole of the reaction as written. Then AH°, - -802.286 k) = -802,286 J. The heat capacity data are tabulated below. Cp a+bX 10T+cX 10/ T + d x 10T 1/mol K CH 2.731 96.3 5.9 -26.836 29,431 4,19 -2.858 -0.385 CO, 22.226 56.2 0.105 -22.518 HO 33.568 -4.201 14.761 N2 29.192 -1.121 3.092 Calculate the T, (adiabatic temperature).

2. Methane gas is combusted with air, supplied in 25% excess. Calculate maximum attainable temperature in the combustion chamber. The reacting gas are supplied at 25°C. Air is taken to be 21% 0, and 79% N. The chemical reaction is, CH, + 20, - CO, + 2H,0, Set the reference temperature to be 298 K. Data are available at this temperatu and it is convenient since the reactants are supplied at this temperature. AH°,- 2AH°, (H,O) + AH°, (CO,) - AHº, (CH,) = 2 -241.827 + -393.505 - (- 74.873) - -802.286 kJ/mol Take the energy balance to be based on 1 mole of the reaction as written. Then AH°, - -802.286 k) = -802,286 J. The heat capacity data are tabulated below. Cp a+bX 10T+cX 10/ T + d x 10T 1/mol K CH 2.731 96.3 5.9 -26.836 29,431 4,19 -2.858 -0.385 CO, 22.226 56.2 0.105 -22.518 HO 33.568 -4.201 14.761 N2 29.192 -1.121 3.092 Calculate the T, (adiabatic temperature).

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
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2. Methane gas is combusted with air, supplied in 25% excess. Calculate the maximum attainable temperature in the combustion chamber. The reacting gases are supplied at 25°C. Air is taken to be 21% O, and 79% N. The chemical reaction is, CH, + 20, = CO, + 2H,0, !! Set the reference temperature to be 298 K. Data are available at this temperature and it is convenient since the reactants are supplied at this temperature. AHO, = 2AH°, (H,O) + AH°, (CO,) - AH°, (CH.) 74.873) = 2x -241.827 + -393.505 - (- = -802.286 kJ/mol Take the energy balance to be based on 1 mole of the reaction as written. Then AH°, - -802.286 kJ = -802,286 J. The heat capacity data are tabulated below. Cp = a +bX 10T +cX 10/ T + dX 10 T /mol K a CH. 2.731 96.3 5.9 -26.836 29.431 4.19 -2.858 -0.385 Co, 22.226 56.2 0.105 -22.518 33.568 -4.201 14.761 N2 29.192 -1.121 3.092 Calculate the T, (adiabatic temperature).
Transcribed Image Text:2. Methane gas is combusted with air, supplied in 25% excess. Calculate the maximum attainable temperature in the combustion chamber. The reacting gases are supplied at 25°C. Air is taken to be 21% O, and 79% N. The chemical reaction is, CH, + 20, = CO, + 2H,0, !! Set the reference temperature to be 298 K. Data are available at this temperature and it is convenient since the reactants are supplied at this temperature. AHO, = 2AH°, (H,O) + AH°, (CO,) - AH°, (CH.) 74.873) = 2x -241.827 + -393.505 - (- = -802.286 kJ/mol Take the energy balance to be based on 1 mole of the reaction as written. Then AH°, - -802.286 kJ = -802,286 J. The heat capacity data are tabulated below. Cp = a +bX 10T +cX 10/ T + dX 10 T /mol K a CH. 2.731 96.3 5.9 -26.836 29.431 4.19 -2.858 -0.385 Co, 22.226 56.2 0.105 -22.518 33.568 -4.201 14.761 N2 29.192 -1.121 3.092 Calculate the T, (adiabatic temperature).
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