1. Garrett Scruggs, Kate Jones, and Ryan Squires

3.  Aluminum and Hydrochloric Acid: 2Al+6HCl→2AlCl 3 +3H 2  Aluminum and Sulfuric Acid: 2Al+3H 2 SO 4 →3H 2 +Al 2 (SO 4 ) 3  Baking Soda and Sulfuric Acid: 2NaHCO 3 +H 2 SO 4 → H 2 O+Na 2 SO 4 +CO 2  Baking Soda and Hydrochloric Acid: HCl+NaHCO 3 →NaCl+H 2 O+CO 2  Baking Soda and Vinegar: CH 3 COOH+H 2 O+NaHCO 3 → H 2 O+CO 2 +NaCH 3 COO  n=(PV)/(RT) → 0.700(L)*5(atm)/.08205( L *atm/mol*k)*293(K)=0.146 moles .146 moles was the max amount of moles we wanted for any gas that was created from the reactions. If we went above this we risked the bottle exploding  Calculation for max number of grams of baking soda in vinegar reaction:.146(moles CO2)*(1 mol NaHCO3/1 mol CO2)*(84.01g/1 mol NaHCO3)=12.3 max number of grams of baking soda

4.  All of the previous reactions were used by our group. However, we ran into problems using hydrochloric acid or sulfuric acid as any reaction involving them melted our bottle. Because of this and time restrictions, we decided to use baking soda and vinegar as our main reaction for this project.

5. Latch that opens and closes to hold bottle in place. Bottle held horizontally to give more thrust. First design had bottle tilting up but did not work well. Frame of car holds bottle in place and stops it from moving around during reaction.

6. Testing Trial Vinegar (mL) Baking soda (g)Distance (ft)Issues 12001230 22001117.5Bulging 320012 Bulging 42501410Bulging 52001130 62009.55Bulging 7200122Bulging Competition Trial Vinegar (mL) Baking soda (g) Distance from target (inches)Issues 120010-72 220011.5163 320010.594 420010Did not moveLeaked 5200102 620082Wheels locked 72001097 82009-89 92009.5Did not moveLeaked 102009.533

7.  Our car moved consistently, however the results were quite inconsistent. The distances were not very consistent with the different amounts of baking soda we used. We believe that this inconsistency can be contributed to the bottle bulging/expanding which then affects the pressure inside the bottle, drastically affecting the distances. When a new bottle was used, it did not bulge and our results seemed more consistent. However, after continuous use the bottle would begin to weaken and bulge again. Because of this, the biggest thing we would do in a redesign is get a stronger bottle that would not bulge under the pressure from the reaction. Also, a device that could twist the cap of the bottle quickly could help make the data more consistent, so then the car would not be held back by the person unscrewing he lid.