0 gkJ 0.02GW 0,00843 7 · 2020. 11. 26. · Ptotal'RE1170 800mmHg C gyLatmm gkJ O00843472Mol...
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Name_______________________________________________ Assignment 23 - Gases CP2120 Fall 2020 1. A student wants to build a manometer using a fluid that has a density of 8.597 g/mL. What will the height of a column of this fluid be at a pressure of 1.00 atm? 2. Determine the number of moles of helium in a 2.25-L balloon at 288 K when the pressure is 1.023 bar. 3. What pressure of nitrogen gas results if a 75.0 L cylinder is filled with 9.909 kg of nitrogen at 18.5 °C? 4. If the total pressure of a gas mixture containing oxygen and nitrogen is 10 5 Pa, what is the partial pressure of oxygen if the mole fraction of nitrogen gas is 0.700? 5. A 2.000-L sample of dry air at 25.25 °C and 990.9 mm Hg contains 0.8729 g N2 plus some other gases. Determine the partial pressure (in mm Hg) of N2 in the air sample. 6. Hydrogen gas generated during a chemical reaction is collected over water. Determine the mass of hydrogen collected if 200 mL of gas is collected at 23 o C and 800 mm Hg total pressure. At 23 o C, the partial pressure of water is 21.1 mm Hg. 7. Determine the root mean square speed of oxygen molecules in the atmosphere on a warm day (27 °C). 8. A container contains helium and argon gases. Calculate the ratio of effusion rates of helium and argon through a tiny hole in the container at room temperature (25 o C). 9. Use the ideal gas equation and the van der Waals equation to calculate and compare the pressure exerted by 1.000 mole of carbon dioxide gas in a 10.00-L flask at 0.000 o C. Key 5 Sig figs 3 I 1.20in p pgh h 101,325 8.597 cl mm 3 fokg g 9.8O665ng z 1.20l8mh Pfeg m s C 3 4 3 3 PV nRTjn P 3zbafyj2 moi.yg.zg.ge 0.096124mo1O 096lmol 3 4 113at PV HRT 9.909kg Nz.io omzgffYz2g kg 353.722molP nRI 353.72mol 0.082053lgatommol.is 965K 18.51273.15 15 291.61515 4 13 112.87 atm p 3 PNE Rota 0.700 10512.0700 70,00013 z p iaT 07005 132 1 4 100,000Pa 70,000Pa 30,000134 4 4 25.25 1273.15714 298.40 K 0.8729g Nz ImolNz 5 28,0 5 0.031160molar 289.9 273.115 P.wz.sn 0.031l60mo1rQ082057l atmmoT'K 298.40K 160 9 289 mmHg 231,2000 latin 3 296.15 1 e 3 pv nRTjn pzv G78 qmmltg.IE mHg CQ200D Ptotal'RE 117 0 800 mmHg C gyLatmm gkJ O 00843472 Mol Pazos 21.1 mmHg Pete80021.1 mmHg _778.9 mmHg m 0,00843 Mol 7 0 5 1889 0.01200 g 0.02GW f3.8.31451 IM tK 30fe K k2 C233854m s t k 483,585ms 484ms 0.0319988kg moi 3 rate 39.948 g mot Helium effuses 19,816655753 2 4,45 about 442 times ratc argfz 01588g.no 6 fasterthan argon dm3 1L if 4 4 PV nRT Puea hR t 000mol.cz 82o057hatmmoTK223 l5K 2.241387 atm 2 z41atm af MV nbJ nRTjpdw huR.gg qn_ t000mol00820S7Latmmd k 223i5 3.6073Eatmmol 2 l.ooo.mn 10.00L 1.000 moi 0.042816L moi 10.0012 2.251025 atm 0.36073 atm 1.890295 atm 1.890
Transcript of 0 gkJ 0.02GW 0,00843 7 · 2020. 11. 26. · Ptotal'RE1170 800mmHg C gyLatmm gkJ O00843472Mol...
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Name_______________________________________________ Assignment 23 - Gases CP2120 Fall 2020 1. A student wants to build a manometer using a fluid that has a density of 8.597 g/mL. What will the height of
a column of this fluid be at a pressure of 1.00 atm?
2. Determine the number of moles of helium in a 2.25-L balloon at 288 K when the pressure is 1.023 bar.
3. What pressure of nitrogen gas results if a 75.0 L cylinder is filled with 9.909 kg of nitrogen at 18.5 °C?
4. If the total pressure of a gas mixture containing oxygen and nitrogen is 105 Pa, what is the partial pressure of oxygen if the mole fraction of nitrogen gas is 0.700?
5. A 2.000-L sample of dry air at 25.25 °C and 990.9 mm Hg contains 0.8729 g N2 plus some other gases. Determine the partial pressure (in mm Hg) of N2 in the air sample.
6. Hydrogen gas generated during a chemical reaction is collected over water. Determine the mass of hydrogen collected if 200 mL of gas is collected at 23 oC and 800 mm Hg total pressure. At 23 oC, the partial pressure of water is 21.1 mm Hg.
7. Determine the root mean square speed of oxygen molecules in the atmosphere on a warm day (27 °C).
8. A container contains helium and argon gases. Calculate the ratio of effusion rates of helium and argon
through a tiny hole in the container at room temperature (25 oC).
9. Use the ideal gas equation and the van der Waals equation to calculate and compare the pressure exerted by 1.000 mole of carbon dioxide gas in a 10.00-L flask at 0.000 oC.
Key5 Sigfigs3 I
1.20inp pgh h 101,325 8.597 clmm3 fokgg 9.8O665ngz1.20l8mhPfeg m s C 3 43 3PV nRTjn P 3zbafyj2 moi.yg.zg.ge 0.096124mo1O096lmol
3 4 113atPV HRT9.909kgNz.ioomzgffYz2gkg 353.722molP nRI 353.72mol0.082053lgatommol.is 965K18.51273.15 15 291.61515 4 13112.87atm
p 3 PNERota0.700 10512.0700 70,00013zpiaT 07005 132 1 4 100,000Pa70,000Pa30,0001344 4
25.251273.15714298.40K0.8729gNzImolNz 5
28,0 5 0.031160molar 289.9 273.115P.wz.sn 0.031l60mo1rQ082057l atmmoT'K 298.40K 160 9 289 mmHg231,2000latin 3 296.151 e3 pvnRTjnpzvG78qmmltg.IEmHgCQ200DPtotal'RE1170 800mmHg C gyLatmm gkJ O00843472MolPazos21.1mmHgPete80021.1mmHg_778.9mmHg m 0,00843Mol 70 51889 0.01200 g
0.02GWf3.8.31451IM tK 30feK k2 C233854mst k 483,585ms 484ms0.0319988kgmoi 3rate 39.948gmot Heliumeffuses19,816655753 2 4,45 about442timesratcargfz01588g.no 6 fasterthanargon
dm3 1Lif 4 4PV nRT Puea hR t000mol.cz82o057hatmmoTK223l5K 2.241387atm 2z41atm
afMVnbJnRTjpdw huR.gg qn_ t000mol00820S7Latmmd k 223i5 3.6073Eatmmol2l.ooo.mn10.00L 1.000moi0.042816Lmoi 10.00122.251025atm 0.36073atm 1.890295atm 1.890
