L20S07_IdealGases_Compressibility_AbsTemp 03-05-07

L20S07_IdealGases_Co - Chem1A L20"Ideal Gases,Compressibility Abs Temp" Previously 2001 A.Pines,M.Kubinec,UCB L20-1 ChemQuiz 19.4 Which

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Unformatted text preview: Chem1A L20: "Ideal Gases,Compressibility, Abs. Temp." Previously 2001 A.Pines,M.Kubinec,UCB L20-1 ChemQuiz 19.4 Which molecular orbital in benzene formed from the atomic orbitals shown has the highest energy? energy? 1) 2) 3) L20-2 2001 A.Pines,M.Kubinec,UCB ChemQuiz 20.01 Which is the energy diagram for the phosphorous hybrid atomic orbitals in PCl5 after hybridization? hybridization? 1) 2001 A.Pines,M.Kubinec,UCB 3d 3p 3s 2) 3) L20-4 A.Pines,M.Kubinec,UCB 1 Chem1A L20: "Ideal Gases,Compressibility, Abs. Temp." Ideal Gas, Boyle, Constant T P Isothermal Compression, Expansion P C Summary PV=const PV= T2 T1 P const P= V T2 Compressibility =- 1 V V P B A C A B A L19-6 T1 V A.Pines,M.Kubinec,UCB V L14-2 UC Regents 1 A V Effect of T, Charles, Gay-Lussac GayV PV=nRT piV=niRT Gas 2 Gas 1 The Constants and Variables PV=nRT PV=nRT PV=nRT PV=nRT V=nRT PV=nR P = pressure in atmospheres Vm(STP)=22.4L V = volume in liters n = number of moles R = 0.08206 atm L K-1 mol-1 (8.314 J K-1 mol-1) T = absolute temperature in Kelvins UC Regents L19-10 T(K) = T(C ) + 273.15 STP = 1 atm, 273 K atm, T L14-5 A.Pines,M.Kubinec,UCB Torecellian Barometer Pressure = force/area 1 standard atmosphere = 1 atm = 760 mm Hg = 760 torr = 101,325 Pa 2001 A.Pines,M.Kubinec,UCB L20-7 Ideal Gas, Boyle, Constant T P C PV=const PV= P const P= V T1 B A T1 V 2001 A.Pines,M.Kubinec,UCB V L20-8 1 A.Pines,M.Kubinec,UCB 2 Chem1A L20: "Ideal Gases,Compressibility, Abs. Temp." Ideal Gas, Boyle, Constant T P PV=const PV= T2 T1 P const P= V T2 T1 1 V 2001 A.Pines,M.Kubinec,UCB V L20-9 Isothermal Compression, Expansion P C B A A C A B A L20-10 Compressibility =- 1 V V V P V 2001 A.Pines,M.Kubinec,UCB ChemQuiz 20.1 Diving Which isothermal ascent poses the gravest danger if breath is held? 1) 10m 0m 2001 A.Pines,M.Kubinec,UCB 0m 1 atm 10 m 2 atm 2) 20m 10m 3) 50m 30m L20-11 A.Pines,M.Kubinec,UCB 3 Chem1A L20: "Ideal Gases,Compressibility, Abs. Temp." Effect of T, Charles, Gay-Lussac GayV PV=nRT piV=niRT Gas 2 Gas 1 T(K) = T(C ) + 273.15 T( STP = 1 atm, 273 K atm, T L20-13 2001 A.Pines,M.Kubinec,UCB The Constants and Variables PV=nR PV=nRT PV=nRT PV=nRT PV=nRT V=nRT P = pressure in atmospheres Vm(STP)=22.4L V = volume in liters n = number of moles R = 0.08206 atm L K-1 mol-1 (8.314 J K-1 mol-1) T = absolute temperature in Kelvins 2001 A.Pines,M.Kubinec,UCB L20-14 Examples of T (K), Approach to Absolute Zero Sun Interior Sun Surface W Melt Point ~108 LN2 Boil Point ~104 LH2 Boil Point ~103 LHe Boil Point ~77 ~20 ~4 H2O Boil Point ~373 Dilution Fridge ~10-3 H2O Melt Point ~273 Laser Cooling ~10-6 CO2 Sublime Point ~195 Spin Temperature ~10-9 2001 A.Pines,M.Kubinec,UCB L20-15 A.Pines,M.Kubinec,UCB 4 Chem1A L20: "Ideal Gases,Compressibility, Abs. Temp." ChemQuiz 20.2 An ideal gas in a 1 L balloon is heated from 100C to 200C 100 200 at 1 atm. What is the final atm. volume of the balloon? balloon? 1) < 2 L 2001 A.Pines,M.Kubinec,UCB 1L 1 atm 100C 100 2) 2 L 3) > 2 L L20-16 ChemQuiz 20.3 CH4 (g) + 2 O2 (g) CO2 (g) + 2 H2O (g) A mixture of 1.0 atm of CH4, and 2.0 atm O2 react in a 1 L flask at constant high T. What happens to the total pressure ? 1) increases 2001 A.Pines,M.Kubinec,UCB CH4 O2 2) same 3) decreases L20-18 ChemQuiz 20.4 atoms occupies ~22 L One mole of sulfur ~22 L ~0.25 atm ~546 K at 0.25 atm, 546 K. atm, K. What is the molecular formula of the sulfur? sulfur? 2) S2 1) S 2001 A.Pines,M.Kubinec,UCB 3) S8 L20-20 A.Pines,M.Kubinec,UCB 5 Chem1A L20: "Ideal Gases,Compressibility, Abs. Temp." Lecture Complete 2001 A.Pines,M.Kubinec,UCB L20-22 A.Pines,M.Kubinec,UCB 6 ...
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This note was uploaded on 08/19/2009 for the course CHEM 1A taught by Professor Nitsche during the Spring '08 term at University of California, Berkeley.

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