Hilary Beutler, Lacey Kloster, Cassie Loren

Reaction Chemistry HCl(aq)+NaHCO 3 (aq)  H 2 O(l)+CO 2 (g)+NaCl(s) To Produce 4.5atm of pressure inside the bottle: 4.5atm 0.7L = n L-atm/mol-K 293K n = moles of Sodium Bicarbonate and Hydrochloric Acid g NaHCO 3 = mol 84 g/mol = g NaHCO 3 L HCl = mol ÷ 12.1 mol/L = L HCl = 10.8 mL HCl

Testing Results pressuretrial #1trial#2trial#3 distance 4 atm16.25 ft11.00 ft13.50 ft 4.25 atm21.00 ft24.00 ft19.50 ft 4.5 atm14.00 ft ft

Conclusions Our car did not perform as well as we would have liked The car was inconsistent and had a tendency to turn and flip over, which resulted in it traveling smaller distances. The bottle leaked around the cap, which also made the data inconsistent because different amounts of pressure were released before and not used to propel the car. If we were to re-design our car, we would lower the center of gravity to make it more stable and more likely to travel straight In a re-design of our car we could make the car more sturdy by adding diagonal cross-links. Apparently, frog stickers tend to make the car hop and flip over