CHM 101L M6 Enginering a Better Air Bag Lab Report Complete

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Southern New Hampshire University *

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Chemistry

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Jan 9, 2024

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Report
Engineering a Better Airbag Student Name David Arlotta Date 12/3/2023
1 Data Data Table 1: Model Air Bag Activity Data and Calculations Volume of 6 × 9 inch bag 1.20 L Room temperature (in K) 295k Room pressure (in atm) 1.01 Moles of CO 2 required to inflate bag at room temperature and pressure (1.2)(1.10)/(0.0821)(297.964) =0.0539 Balanced equation for the reaction of NaHCO 3 and CH 3 COOH NaHCO3(s)+CH3COOH (aq)>>>H2O(I) +CO2(g)+CH3COOHa(aq) Mass of NaHCO 3 needed for the reaction 4.35667 Volume of vinegar required (0.833 M acetic acid) 1 Liter Data Table 2: Model Air Bag Trial # NaHCO 3 (grams) Vinegar (mL) Observations 1 4.35 16.66 The bag was slightly inflated because of the reaction and the mixture was fizzing 2 4.50 21.66 Similar to trail 1 just more noticeable 3 4.70 26.66 The bag was more inflated than the last 2 trials but the mix still was fizzing © 2016 Carolina Biological Supply Company
2 Data Table 3: 80-L Driver-Side Air Bag Activity Calculations Moles of CO 2 required to inflate 80-L driver- side air bag at room temperature and pressure 1.01atm x 80L = 0.0821 * 295k 80.8 = 24.14 = 3.25 moles Balanced equation for the reaction of NaHCO 3 and CH 3 COOH NaHCO3 + CH3COOH = NaCH3COO + H2O +CO2 Grams of NaHCO 3 needed for the reaction 84.0 g * 3.25 moles = 273 grams mL of CH 3 COOH (0.833 M) needed for the reaction 3.25 moles / 0.833mol/1L x 1000 = 3901.56 ml Data Table 4: 160-L Front Passenger-Side Air Bag Activity Calculations Moles of CO 2 required to inflate 160-L front passenger- side air bag at room temperature and pressure 1.0 1 atm * 160 = 0.0821 * 295 161.60 = 24.14 161.60/24.14 = 6.70 moles Balanced equation for the reaction of NaHCO 3 and CH 3 COOH NaHCO3 + CH3COOH = NaCH3COO + H2O +CO2 Grams of NaHCO 3 needed for the reaction 84.0 * 6.70 = 562.80 grams mL of CH 3 COOH (0.833 M) needed for the reaction 6.70 / 0.833 mol * 1000 = 8043.22 mL 1. Based upon the observed performance of the air bag models and the amounts of sodium bicarbonate and acetic acid (vinegar) needed for an automotive air bag of 80 or 160 L, are these reactants a good substitute for sodium azide? One additional note regarding sodium azide: the rate of inflation after a triggering impact is 40 milliseconds (0.04 s). while sodium bicarbonate and acetic acid offer potential advantages in terms of safety, environmental impact, and availability, their suitability as © 2016 Carolina Biological Supply Company
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3 substitutes for sodium azide in automotive air bags depends on meeting critical performance criteria, especially the rate of inflation. Further testing and optimization may be necessary to align their performance with the stringent safety standards set for automotive applications. So Id say these are decent substitutes for sodium azide © 2016 Carolina Biological Supply Company