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A fuel used in an engine has its chemical composition expressed as CsH1s. Find the chemically correct air-fuel ratio for complete combustion of 1kg of this fuel. If the dry exhaust gases consist of 12% CO2 and 3% CO by volume and the remainder is N2: (a) Calculate the actual air-fuel ratio being used, and (b) Determine whether the mixture strength is rich or lean. Given: C = 12 H = 1 Air (mass) = O₂ (23%) + N₂ (77%) CO₂ = 44 CO = 28 N₂ = 28 1 kg C= 2 kg O₂ 1 kg H = 8 kg 0₂

A fuel used in an engine has its chemical composition expressed as CsH1s. Find the chemically correct air-fuel ratio for complete combustion of 1kg of this fuel. If the dry exhaust gases consist of 12% CO2 and 3% CO by volume and the remainder is N2: (a) Calculate the actual air-fuel ratio being used, and (b) Determine whether the mixture strength is rich or lean. Given: C = 12 H = 1 Air (mass) = O₂ (23%) + N₂ (77%) CO₂ = 44 CO = 28 N₂ = 28 1 kg C= 2 kg O₂ 1 kg H = 8 kg 0₂

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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QUESTION THREE

QUESTION THREE: A fuel used in an engine has its chemical composition expressed as CsH1s. Find the chemically correct air-fuel ratio for complete combustion of 1kg of this fuel. If the dry exhaust gases consist of 12% CO2 and 3% CO by volume and the remainder is N2: (a) Calculate the actual air-fuel ratio being used, and (b) Determine whether the mixture strength is rich or lean. Given: C = 12 H=1 Air (mass) = 0₂ (23%) + N₂ (77%) CO₂ = 44 CO = 28 1 kg C = 23 kg 0₂ N₂ = 28 1 kg H = 8 kg 02
Transcribed Image Text:QUESTION THREE: A fuel used in an engine has its chemical composition expressed as CsH1s. Find the chemically correct air-fuel ratio for complete combustion of 1kg of this fuel. If the dry exhaust gases consist of 12% CO2 and 3% CO by volume and the remainder is N2: (a) Calculate the actual air-fuel ratio being used, and (b) Determine whether the mixture strength is rich or lean. Given: C = 12 H=1 Air (mass) = 0₂ (23%) + N₂ (77%) CO₂ = 44 CO = 28 1 kg C = 23 kg 0₂ N₂ = 28 1 kg H = 8 kg 02
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