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Launching Soda Bottle Rockets using Hydrogen + Oxygen

Launching Soda Bottle Rockets using Hydrogen + Oxygen. Steve Sogo Laguna Beach High School. Photo of hydrogen-powered soda bottle rocket in flight. Photo credit = Cameron Zuziak, LBHS class of 2014. Electronic Ignition.

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Launching Soda Bottle Rockets using Hydrogen + Oxygen

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  1. Launching Soda Bottle Rockets usingHydrogen + Oxygen Steve Sogo Laguna Beach High School

  2. Photo of hydrogen-powered soda bottle rocket in flight Photo credit = Cameron Zuziak, LBHS class of 2014

  3. Electronic Ignition • Students make electronic fuses from aluminum foil—this allows for safe, reliable ignition. http://youtu.be/mRMyMwntb8c

  4. Synopsis of Student Tasks • Balance equation for combustion of H2 • Measure volume of bottle (they aren’t precisely 2.00-liters!) • Use mole ratios to determine volumes of H2 and O2 needed to fill the bottle • Use ideal gas law to determine moles of gases needed 2 H2 (g) + O2 (g)  2 H2O (g)

  5. Synopsis of Student Tasks (part 2) • Stoichiometry for generating O2 (g) • Balance equation for decomposition of H2O2 • Determine mass of H2O2 required • Determine volume of 10% H2O2 solution required • Graph energy profile for catalyzed and uncatalyzed decomposition reaction (given Hand Ea values) H = -95 kJ/mol H2O2

  6. Synopsis of Student Tasks (part 3) • Stoichiometry for generating H2 (g) • Balance eqn for rxn of Ca with H2O • Determine mass of Ca needed • Determine volume of H2O needed • Calculate kJ of heat produced in the reaction • Why use excess H2O? • How to compensate for oxidized calcium? • After launching, sketch energy profiles and explain why the rocket launches

  7. The bottle makes a difference! • Two outcomes are possible—a “rocket” that launches into the sky (soda bottle) or a “bomb” that explodes impressively (water/juice/milk bottle)

  8. Time for a video! • http://youtu.be/rFakqDf-Bwc This student-filmed video shows load and launch activities (done in a 90 minute class period)

  9. Use of instructional videos • Three instructional videos help students do the right things: • Making fuses http://youtu.be/eaVyCz5Bqro • Generating gases http://youtu.be/hyMHLUUH1Zg • Launch pad procedures http://youtu.be/28zOejqRe6s

  10. AACT will help distribute this lab • The Rocket Lab was honored as a Grand Prize winner in the “Best Of” submissions to the American Association of Chemistry Teachers. • Student instruction pages and teacher notes will be provided through the AACT website

  11. Address Questions To: • Steve Sogo, Laguna Beach High School • ssogo@ lbusd.org • YouTube Channel = ACR92651

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