CHE 169 Exp.## 8 MOLAR VOLUME OF A GAS LABORATORY REPORT Name Section Desk No. D

Question

CHE 169 Exp.## 8 MOLAR VOLUME OF A GAS LABORATORY REPORT Name Section Desk No. Date DATA: RECORD ALL DATA IN INK using the correct number of significant figures and correct units 1. Mass of magnesium sample 2. Volume of hydrogen 3. Temperature of hydrogen 4. Temperature of water rn 6. Difference in water levels 7. Aqueous vapor pressure SHOW COMPLETE "SET-UPS" (and the rounding off) FOR ALL CALCULATIONS on the back of this page or on a separate sheet. Report results to the correct number of significank figures and correct units 1. Absolute temperature of the gas 2. Mercury equivalent of the difference of water levels 3. Partial pressure of dry hydrogen 4. Volume of dry hydrogen at STP 5. Moles of hydrogen 6. Molar volume at STP 7. Average molar volume at STP Average deviation 8, % Dev. Of average STP molar V from ideal STP molar v

Explanation / Answer

For Trial 1,

Absolute Temperature of Gas = 273.15 + 21.9 = 295.05 K

Mercury equivalent of the difference of water levels = 100 mm Hg

Partial pressure of dry Hydrogen = 761 - 100 = 661 mm Hg = 0.869 atm

Volume of dry Hydrogen at STP = 94.15 mL = 0.09415

Moles of Hydrogen = PV / RT = (0.869 x 0.09415) / (0.0821 x 295.05)

Moles of Hydrogen = 0.00338

Molar Volume at STP = 0.09415 / 0.00338 = 27.85 L

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