Katie Hodder Gas laws lab report

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Memorial University of Newfoundland *

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1010

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Chemistry

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Feb 20, 2024

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pdf

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5

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Katie Hodder November 23rd, 2023 Chemistry lab report “Gas Laws” Results: Table #1 “Pressure and Volumetric data table” Pressure (kPa) Volume (mL) 88.36 kPa 15.7 mL 109.30 kPa 12.7 mL 130.00 kPa 10.7 mL 79.89 kPa 17.7 mL 66.83 kPa 20.7 mL *added 0.7 to each volume recorded for less error*
Table #2 “Pressure and Absolute Temperature” Pressure (kPa) Temperature (C) 108.97 kPa 50.80 C 104.71 kPa 36.50 C 101.70 kPa 24.10 C 98.25 kPa 18.30 C 96.92 kPa 10.10 C
Table #3 “Determination of the Gas Law Constant, R” The mass of Magnesium solid used 0.0133 g Amount of Hydrochloric acid used 10 mL **Moles of H ₂ gas 0.00055 mol The volume of gas in the eudiometer tube 13.9 mL = 0.014 L Temperature of water 22.7 C Temperature of gas 295.85 K Barometric pressure (P atm) 765 mm Hg Vapour pressure of water 20.70 mm Hg **Pressure of H ₂ gas (P H ₂ ) 765 mm Hg 1.007 atm R-value 0.086 J / mol·K Sample Calculations: Mols of H ₂ gas: 0.0133g x 1 mol/24.31g = 0.0005471 mols → 0.00055 mol H ₂ R-value: (1.0066 b) (0.0139 L) / (0.0005471 mol) (295.85 K) = 0.08646 J/mol·K Pressure of H ₂ gas (P H ₂ ): P H ₂ = nRT/V P H ₂ = (765 mm Hg)(0.086 J/ mol·K)(295.85 K) / 0.014 L P H ₂ = 1.007 atm % error R-value: R actual - R calculated / R actual x 100% = 0.0821 - 0.086 / 0.0821 x 100% = 4.75%
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