Reaction Powered CarDaniel Reid

Conner SmithSarah Wong

Group Picture with Car

[Hydrochloric Acid]+[Calcium Carbonate(Crayola Chalk)][Calcium Chloride]+[Water]+[Carbon Dioxide]

2HCl(aq)+CaCO3(s)CaCl2(aq)+H2O(l)+CO2(g)

Molar Mass CaCO3=100.09 g/mole

Reaction Chemistry

€

0.06145 mol CaCO32 mol HCl

1 mol CaCO3

⎛ ⎝ ⎜ ⎞

⎠ ⎟= 0.1229 mol HCl needed

€

0.1229 mol HCl 1 L HCl12.1 mol HCl( )

1000 mL1 L( ) =10.2 mL HCl (12.1 M)

€

0.06145 mol CaCO31 mol CO2

1 mol CaCO3

⎛ ⎝ ⎜ ⎞

⎠ ⎟= 0.06145 mol CO2

€

PBottle = nRTVBottle

= (0.06145 mol CO2)(0.0821 L - atm/mol - K)(293 K)((0.700 L Bottle) - (0.314 L Water ) - (0.01074 L HCl))

= 3.94 atm +1 atmInitial P = 4.94 atmBottle

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6.150 g CaCO31 mol CaCO3

100.09 g CaCO3

⎛ ⎝ ⎜ ⎞

⎠ ⎟= 0.06145 mol CaCO3

Car DesignPowered by ORANGE (spew)

Calcium CarbonateCaCO3 (g)

Hydrochloric Acid (12.1 M)HCl (mL)

WaterH2O (mL)

Pressure of Bottle(atm) Distance (ft)

6.006 10.0 290 4.61 106.152 12.5 287.5 4.70 206.124 15.0 310 4.92 207.101 15.0 310 5.55 306.473 15.0 310 5.14 27.56.507 15.0 310 5.17 266.407 15.0 310 5.11 20

Test Day-different surface6.013 17.5 307.5 4.85 21.086.199 17.5 307.5 4.97 26.426.011 17.5 307.5 4.85 25.5

Testing Results

Testing Results

5.8 6 6.2 6.4 6.6 6.8 7 7.20

5

10

15

20

25

30

35

Distance VS Mass Calcium Carbonate (Chalk)

Test Track ResultsTest Day Results

Mass Calcuium Carbonate-Chalk (g)

Dis

tanc

e (f

t)

Performance: Reasonably consistent Spewed Approximately right distance

Re-Design Ideas: Lighter (weight of car) No spew (angle of bottle) Re-work wheel assembly (roll straight & less friction) Use pure calcium carbonate instead of Crayola chalk

Conclusions