Octane (C 8 H 18 ) burns with air at a mass-based air–fuel ratio of 13. Using the combined atom balance and water–gas shift reaction approach, determine the chemical reaction describing this process...

Octane (C₈
H₁₈) burns with air at a mass-based air–fuel ratio of 13. Using the combined atom balance and water–gas shift reaction approach, determine the chemical reaction describing this process for a product temperature of (a) 500 K, (b) 1000 K, and (c) 1500 K.