3.  2HCl+CaCO 3  HCO 3 - + H + +CaCl 2  HCO 3 - + H + +CaCl 2  CO 2 +H 2 O+CaCl 2  Theoretical Predictions › Used 42.0mL HCl (excess reagent) and 22.0g CaCo 3 › (22.0g CaCO 3 /1) x (1mol CaCO 3 /100.1g CaCo 3 ) x (1mol CO 2 /1mol CaCO 3 )x (22.4L/1mol CO 2 )= 4.9L CO 2 › P= ((.2178moles CO 2 )(.08205atmL/molK)(293K))/(1.2L)= 4.4atm

4. Reaction Vessel Pressure Vessel Troublesome Seals/Excess Pressure Release Connecting Hose Nozzle Angle Adjustment and Support Beam

6.  Our car’s design was very hard to have any sort of consistency with due to the added failure points.  Although we only had one truly good run (-3in.) we believe our car had the potential to consistently reach this distance if we had fewer design flaws.  Improvements (given more time and better materials) would include › Heavier duty seals/sealant › More consistent nozzle › Lighter chassis › Better delivery method for Calcium Carbonate  No Kimwipes in delivery method  Overall we were satisfied with our one good run although we would have liked to have had more consistency.