Propane (C3H8) reacts with 400% theoretical air in a burner in which the reactants and products arrive and leave at 25°C and 1 atm pressure (see Figure Q1). The surroundings temperature is also at 25°C. Answer the following questions. a) b) c) d) Write the chemical reaction for this combustion process How much heat is released in the combustor during this process? Which fraction of the heat calculated in part ii of this question has been transferred to the environment? Briefly explain your reasons. Calculate the mole fractions of H2O, CO2 and N2 in the exhaust gases. Due to a mechanical fault in the system, the air supply suddenly drops to 80% of the stoichiometric air, without any calculations answer the following questions. e) f) What happens to the heat release of the combustor? Explain your reasons in less than 50 words. Which molecules you expect to exist in the exhaust gases. Explain your reasons in less than 50 words. C₂H₂ +Air P=1 atm, T-25°C Hint: R=8.3143 kJ/kgmol.K. Combustor Figure Q1 Exhaust gases P=1 atm, T-25°C
Propane (C3H8) reacts with 400% theoretical air in a burner in which the reactants and products arrive and leave at 25°C and 1 atm pressure (see Figure Q1). The surroundings temperature is also at 25°C. Answer the following questions. a) b) c) d) Write the chemical reaction for this combustion process How much heat is released in the combustor during this process? Which fraction of the heat calculated in part ii of this question has been transferred to the environment? Briefly explain your reasons. Calculate the mole fractions of H2O, CO2 and N2 in the exhaust gases. Due to a mechanical fault in the system, the air supply suddenly drops to 80% of the stoichiometric air, without any calculations answer the following questions. e) f) What happens to the heat release of the combustor? Explain your reasons in less than 50 words. Which molecules you expect to exist in the exhaust gases. Explain your reasons in less than 50 words. C₂H₂ +Air P=1 atm, T-25°C Hint: R=8.3143 kJ/kgmol.K. Combustor Figure Q1 Exhaust gases P=1 atm, T-25°C
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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Transcribed Image Text:Propane (C3H8) reacts with 400% theoretical air in a burner in which the reactants and
products arrive and leave at 25°C and 1 atm pressure (see Figure Q1). The surroundings
temperature is also at 25°C.
Answer the following questions.
a)
b)
c)
d)
Write the chemical reaction for this combustion process
How much heat is released in the combustor during this process?
Which fraction of the heat calculated in part ii of this question has been transferred
to the environment? Briefly explain your reasons.
Calculate the mole fractions of H₂O, CO2 and N2 in the exhaust gases.
Due to a mechanical fault in the system, the air supply suddenly drops to 80% of the
stoichiometric air, without any calculations answer the following questions.
e)
f)
What happens to the heat release of the combustor? Explain your reasons in
less than 50 words.
Which molecules you expect to exist in the exhaust gases. Explain your reasons
in less than 50 words.
C₂H₂ +Air
P=1 atm, T-25°C
Hint: R=8.3143 kJ/kgmol.K.
Combustor
Figure Q1
Exhaust gases
P=1 atm, T=25°C
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