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Propel Car

Propel Car. Shelbie Carmony , Jennifer Trass , Chelsea Stewardson. The Group. Reaction Chemistry. Initial reaction used: 6HCl(aq) + 2Al(s)  2AlCl 3 (aq) + 3H 2 (g) Final reaction used: HCl(aq) + NaHCO 3(s)  CO 2 (g) + H 2 O(l) + NaCl(aq). Calculations.

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Propel Car

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  1. Propel Car ShelbieCarmony, Jennifer Trass, Chelsea Stewardson

  2. The Group

  3. Reaction Chemistry • Initial reaction used: 6HCl(aq) + 2Al(s)  2AlCl3(aq)+ 3H2(g) • Final reaction used: HCl(aq) + NaHCO3(s)  CO2(g) + H2O(l) + NaCl(aq)

  4. Calculations • 12ml HCl = 0.1452 mol HCl = 0.1452 mol NaHCO2 • 0.1452 mol NaHCO2 = 12.1975g NaHCO2 • Pressure calculated = 4.98672 atm • 13ml HCl = 0.1573 mol HCl = 0.1573 mol NaHCO2 • 0.1573 mol NaHCO2 = 13.2144g NaHCO2 • Pressure calculated = 5.4023 atm

  5. Car Design

  6. Testing Results -No spew all runs

  7. Performance Results (Wednesday, December 2, 2009)

  8. Performance Results (Wednesday, December 2, 2009) 25 feet exactly

  9. Performance Results(Friday, December 4, 2009) No spew all trials We assume our bottle was starting to wear and could not hold the pressure which we needed to propel our car forward. We tried different caps, but were still losing some pressure before every run.

  10. Conclusion • Our car had a very simple design that allowed us to attach the bottle to the car quickly and smoothly. • The car rolled well, but we still could have tried to find a way to make the friction of the axel less which would have allowed the car to roll even smoother. • Near the end of the competition our bottle started to leak gas, lessening the pressure. We should have gotten a new bottle and cap to use to ensure that no pressure was lost. • Our car performed better than we expected by reviewing the results in our trial runs. We were very pleased with its performance and making it to the finals.

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