Hilary Beutler, Lacey Kloster, Cassie Loren

Reaction Chemistry

• HCl(aq)+NaHCO3(aq) H2O(l)+CO2(g)+NaCl(s)

• To Produce 4.5atm of pressure inside the bottle:4.5atm • 0.7L = n • 0.08205 L-atm/mol-K • 293Kn = 0.131 moles of Sodium Bicarbonate and Hydrochloric

Acid

g NaHCO3 = 0.131 mol • 84 g/mol = 11.004 g NaHCO3

L HCl = 0.131 mol ÷ 12.1 mol/L = 0.0108 L HCl = 10.8 mL HCl

Testing Results

pressure trial #1 trial#2 trial#3

distance distance distance

4 atm 16.25 ft 11.00 ft 13.50 ft

4.25 atm 21.00 ft 24.00 ft 19.50 ft

4.5 atm 14.00 ft 14.00 ft 16.17 ft

Distance (ft) vs. Pressure (atm)

0

5

10

15

20

25

30

3.9 4 4.1 4.2 4.3 4.4 4.5 4.6

Pressure (atm)

Dis

tan

ce

(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