Exploring Engineering. Chapter 5 Chemical energy. What You Will Learn. Chemical formulae Atomic and molecular masses The mole/mol and Avogadro’s number Basic combustion reactions Stoichiometry Tabular method of determining stoichiometric cfts.
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C8H18 + 12.5O2 = 8CO2 + 9H2O
CO2 = 8 44.0 = 352 lbm.
Heating Value = Energy in fuel and oxidizer
- Energy in the products of combustion
Heating value = 45.5 kJ
The values in the last column are not uniform in sign.
The use of the matrix table in the last example is then