Reaction Car

1
Reaction Car

• Sunny Ovesen, Kara Walton, Rachel Chan

2
Reaction Chemistry

• We decided to create a maximum of 5atms with
  chemical reactions from HCL, baking soda and
  water. From our calculations we decided to do
  12mL of HCL, 12.23g of NaHCO3 (baking soda), and
  10mL of water.

3
Reaction Chemistry Calculations Cont.

• -Calculations
• NaHCO3 HCl ---gt CO2 NaCl H2O
• n(PV)/(RT)
• P5atm
• V700mL0.7L
• R0.08205 (Latm)/(mol-K)
• T293K
• n( 5atm0.7K) / (0.08205 (Katm)/(mol-K)(293K))
• n0.1455867458

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Reaction Chemistry Calculations Cont 2

• HCL
• Baking Soda
• Atm Calc

0.1455867458 moles HCl 1 L Hcl 1000mL 12.0320 mL HCl
1 12.1 moles HCl 1L
0.1455867458 moles HCl 84.008g NaHCO3 12.2305g NaHCO3
1 1 mole NaHCO3
12.0320 mL HCl 2.4064 mL HCl /atm
5 atm
12.2305g NaHCO3 2.4461g NaHCO3 /atm
5 atm
5
Car design
6
Testing Results
Date Trial Length(ft)
25-Nov 1 15
  2 15
  3 10
  4 15
1-Dec 5 15
  6 20
  7 15
  8 20
  9 15
  10 15
  11 22
  13 25
  14 25
  15 15
3-Dec 16 10
  17 5
  18 10
  19 15
  20 20
  21 22
  22 15
  ave 16.14286
7
Conclusion

• During testing, the car went an average of ____.
  However our results weren't consistent due to
  K'Nexs falling off or moving, to produce an
  off-kilter car that caused unwanted friction.
  When the car ran more smoothly we had checked the
  K'Nexs stability and structure. Re-design ideas
  that went on during our experiment was the
  realignment of our wheels because our first
  trials barely moved the car. Another major
  redesign that happened was the testing of
  multiple caps because major malfunctions occurred
  when gas was released. We tested over 10 Propel
  caps to finally find a suitable match for our
  bottle. After these refinements our car moved
  farther. If we were to complete more runs we
  would rebuild part of the car so that the bottle
  was held in place when we turned the cap ensuring
  all the released gas was utilized.