1. Mohammed Alyousif, Brianna Nagel, Lexi Keaveney

2. Our reaction: NaHCO 3 + HCl+H 2 O  NaCl + CO 2 +2H 2 O We started with the maximum pressure to calculate the # of moles needed. 5 ATM = n (.08205 L-Atm/mol-K)(293K) / 0.7 L n=.146 moles Then we converted moles to measurements we could use..146 molesNaHCO3*(84g/mol)=12.3g NaHCO3.146molesHCl*(1 L/12.1moles)*(1000mL/1L)=12.1ml As water doesn’t effect the reaction, we decided to try adding it at different intervals to decrease the volume and help our car move farther. We found 10mL worked best.

3. We wanted the bottle at an angle to increase the thrust. We used zip ties to connect our bottle to the car. We also tried to make the car as stable as possible, though we had some difficulty attaching the bottle to the car so that it was exactly straight.

4. NaHCO3(g)Acetic Acid(mL)Distance(ft) 10.915014.7 10.715015.5 10.815015.2 Tests with Baking Soda and Vinegar Tests with Baking Soda and HCl NaHCO3(g)HCl(mL)H2O(mL)Distance(ft) 12 04 12.212514.5 12.3127.511.5 12.3121019 12.3121017 12.3121020 12.3121017

5. Our original car idea(seen above) would have produce no spew, as it had a filtration system, unfortunately we had many issues with the system leaking and could never get the actual car to move. The car performed well a few times, but it was fairly inconsistent, especially on race day. It flipped a few times and curved to the right on most runs, so we could have redesigned the base of the car to make it more stable. Throughout the project we redesigned the wheels several times to try and reduce friction. We also tested a number of body structures until we found the one that moved the best.