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Event 3: Chemical Engineering Chem-E-Car River Dell High School Team A (RDHSA) Celyne Moh Daniel Ross Ronald Vertsman.

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Presentation on theme: "Event 3: Chemical Engineering Chem-E-Car River Dell High School Team A (RDHSA) Celyne Moh Daniel Ross Ronald Vertsman."— Presentation transcript:

1 Event 3: Chemical Engineering Chem-E-Car River Dell High School Team A (RDHSA) Celyne Moh Daniel Ross Ronald Vertsman

2 Objective Design and construct a car that is powered with a chemical energy source that will travel a given distance and stop. Commercial batteries (for example, AA batteries) are allowed as the power source if a controlled chemical reaction is used elsewhere in the cars system (as a stopping mechanism, for example).

3 Concept Iodine clock reaction Using a light and photo-sensor to control a motor

4 Kinetics Iodine clock: Step 1: IO 3 (aq) + 3 HSO 3 (aq) I (aq) + 3SO 4 2 (aq) + 3H + (aq) Step 2: IO 3 (aq) + 5 I (aq) + 6 H + (aq) 3 I 2 (aq) + 3 H 2 O (l) Step 3: I 2 (aq) + starch {a dark blue iodine/starch complex} Rate = k[NaHSO 3 ] 2 [KIO 3 ] 1 k =

5 Allocation of Budget ItemPrice 100g Potassium Iodate$ g Sodium Bisulfite$ g Starch, Reagent Soluble$55.60 AAA batteries (20 Batteries)$7.07 Distilled Water (3 Bottles)$2.64 Total$92.02

6 Construction Fiberglass Cylinder Batteries Circuitry Old RC car Plexiglas© Copper wiring

7 Circuitry

8 Kinematics Photo-sensor Colors of solutions Distance Traveled = velocity x time The proper concentrations for the reactants is determined so the car travels a given distance.

9 Conclusion Car veers too much o Axle Time of trial varies = distance varies o Concentration of solutions o Human Error o Splashing

10 Reconstruction (2 nd model) Car veering o Replace axle o Replace wheels Varying distances o countdown

11 Observations (2 nd model) Car veered less Car ran varying distances

12 Results (2 nd model)

13 Conclusion (2 nd model) Car Veering o The axle Varying distances o Momentum o Countdown

14 Reconstruction (3 rd model) Front wheel Reduce concentration of solutions Change variable reactant Cork Syringe

15

16 Observations (3 rd model) Car runs straight Trials are more precise Trials are more accurate Solutions are not spilling

17 Final Conclusion Car stops within 5ft of destination Car runs too fast for complete accuracy

18 Questions?


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