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This teaching module explores the oxidation chemistry of JP-8 jet fuel components with a focus on complete and incomplete combustion of hydrocarbons. Students will predict products, conduct experiments, and create lab reports to understand chemical reactions and conservation of atoms.
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Complete and incomplete combustion of hydrocarbons Megan Chirby Community Links High School RET 2009 Teaching Modules University of Illinois at Chicago December 12, 2009 RET 2009 Program NSF EEC 0743068 (A. Linninger, PI)
Project Motivation • US Air Force concerned about jet fuel pollutants • Oxidation chemistry of major components of JP-8 fuel unknown
conditions • Fuel source - Xylene • Low O2 flow • Diluted by CO2 and N2 gas
Module objectives • SWBAT define and discuss complete and incomplete combustion • SWBAT predict the products of a combustion reaction • SWBAT report experiment findings in a laboratory report
Content Standards • 12.11.53 Understand that in chemical reactions, atoms combine into molecules by means of bonds (e.g., by sharing electrons to form covalent or metallic bonds or by exchanging electrons to form ionic bonds). • 12.11.56 Understand that the conservation of atoms in a chemical reaction, as summarized in a balanced chemical equation, leads to the ability to calculate theoretical masses of reactants and products. • 12.11.57 Understand how to read, interpret, and balance chemical equations.
Laboratory Standards • 11.A.3a Formulate hypotheses that can be tested by collecting data • 11.A.3b Conduct scientific experiments that control all but one variable • 11.A.3g Report and display the process and results of a scientific investigation • 11.B.4f Evaluate the test results based on established criteria, note sources of error and recommend improvements. • 13.A.4a Estimate and suggest ways to reduce the degree of risk involved in science activities.
Chemical reactions Unit • Synthesis • Decomposition • Single-Displacement • Double-Displacement • Combustion
Combustion Laboratory • Complete Combustion • Cool Test Tube 2. Extinguish 3. Wash with limewater • Candle
Combustion Laboratory • Incomplete Combustion • Test tube with water reacts with CaC2 • Acetylene gas forms • Gas displaces water using pneumatic trough • Incomplete combustion reaction Amount of water/ acetylene gas 1 2 3 4
Acknowledgements • Dr. Kenneth Brezinsky • Dr. Brad Culbertson • Carolyn Fortson and Ilana Green-Cember • UIC • Community Links High School • NSF RET EEC 0743068 (A. Linninger, PI)