Explanation Write the combustion reaction of octane with 30 % excess air and 10 % carbon monoxide as follows. C 8 H 18 + ( 1.3 × 12.5 ) [ O 2 + 3.76 N 2 ] → ( 0.9 × 8 ) CO 2 + ( 0.10 × 8 ) CO + 9 H 2 O + x O 2 + ( 1.3 × 12.5 × 3.76 ) N 2 (I) Write the expression to calculate the reversible work ( W rev ) . W rev = ∑ N R ( g ¯ f , R ∘ ) − ∑ N R ( g ¯ f , P ∘ ) = { N C 8 H 18 ( g ¯ f , C 8 H 18 ∘ ) − N CO 2 ( g ¯ f , CO 2 ∘ ) − N CO ( g ¯ f , CO ∘ ) + N H 2 O ( g ¯ f , H 2 O ∘ ) } (II) Here, number of moles of product is N P , , Gibbs energy of formation of the product is g ¯ f , P ∘ , number of moles of reactants is N R , Gibbs energy of formation of the reactant is g ¯ f , R ∘ , number of moles of C 8 H 18 is N C 8 H 18 , Gibbs energy of formation of C 8 H 18 is g ¯ f , C 8 H 18 ∘ , number of moles of CO 2 is N CO 2 , Gibbs energy of formation of CO 2 is g ¯ f , CO 2 ∘ , number of moles of CO is N CO , Gibbs energy of formation of CO is g ¯ f , CO ∘ , number of moles of H 2 O is N H 2 O , and Gibbs energy of formation of H 2 O is g ¯ f , H 2 O ∘ . Write the formula to calculate the reversible work per unit mass of fuel ( w rev ) . w rev = W rev M fuel (III) Here, molar mass of fuel is M fuel . Conclusion: Balance for the Oxygen from Combustion reaction Equation (I). 1.3 × 12.5 = 7.2 + 0.4 + 4.5 + x x = 4.15 Rewrite the complete balanced chemical reaction for combustion as follows: C 8 H 18 + ( 1.3 × 12.5 ) [ O 2 + 3.76 N 2 ] → { ( 0.9 × 8 ) CO 2 + ( 0.10 × 8 ) CO + 9 H 2 O + ( 4

8th Edition

ISBN: 9780073398174

Author: Yunus A. Cengel Dr., Michael A. Boles

Publisher: McGraw-Hill Education

See similar textbooks

Videos

Question

Chapter 15.7, Problem 107RP

To determine

The maximum amount of work which can be produced from burning of n-octane.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 15.7, Problem 106RP

Chapter 15.7, Problem 108RP

Chapter 15 Solutions

Thermodynamics: An Engineering Approach

Ch. 15.7 - How does the presence of N2 in air affect the...Ch. 15.7 - Prob. 2P Ch. 15.7 - Prob. 3P Ch. 15.7 - Is the airfuel ratio expressed on a mole basis...Ch. 15.7 - Prob. 5P Ch. 15.7 - Prob. 6P Ch. 15.7 - Prob. 7P Ch. 15.7 - What does 100 percent theoretical air represent?Ch. 15.7 - Consider a fuel that is burned with (a) 130...Ch. 15.7 - Are complete combustion and theoretical combustion...

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Recommended textbooks for you

Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY