L03S10_LightWaves_abs_emis+01-25-10 (1)

L03S10_LightWaves_abs_emis+01-25-10 (1) - Chem 1A L3:...

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Unformatted text preview: Chem 1A L3: "Light: Waves, Absorption, Emission" Mass Spectrometer Ionization - N Magnet Mass Spectrum Sample Acceleration S 1 H 2H 2, 1H 12C 16 O 13C 16O 2 1H 16O 18O 2 , 16O18O 12C16O 2 1H2H 3He , 13C16O 2 0 10 20 30 18O 2 40 50 L2-5 © 2000 A.Pines M.Kubinec UCB Relative Atomic and Molecular Mass H 1.01 12C Empirical and Molecular Formula Methane Ethylene CH 4 CH2 CH4 C2H8 C3H12 CH2 C2H4 C3H6 CH C2H2 C3H3 L2-2 L2-10 Al 26.98 P 30.97 Fe 55.85 Pb 207.2 H2 2.02 O2 32.00 H2O 18.02 CO2 44.01 L2-5 12.00 C 12.01 O 16.00 Acetylene CH © 2000 A.Pines M.Kubinec UCB © 2010 Pines,Kubinec, Nitsche UCB © 2000 A.Pines M.Kubinec UCB ChemQuiz© 2.3 Combustion of a hydrocarbon with O2 yields products with the mass spectrum shown spectrum shown. Which is the hydrocarbon? hydrocarbon? 18 44 A) CH4 Methane © 2010 Pines,Kubinec, Nitsche UCB B) C2H4 Ethylene C) C2H2 Acetylene L2-3 Empirical and Molecular Formula Methane Ethylene CH4 CH2 CH4 C2H8 C3H12 CH2 C2H4 C3H6 CH C2H2 C3H3 L2-5 Acetylene CH © 2010 Pines,Kubinec, Nitsche UCB © A.Pines,M.Kubinec,UCB 1 Chem 1A L3: "Light: Waves, Absorption, Emission" 30g of phosphorous react with 40 g oxygen gas to form an oxide. What is the emperical formula of the oxide? P ChemQuiz© 2.4 Molar Molar Masses P = 31 g/mol O = 16 g/mol O2 1) PO2 © A.Pines,M.Kubinec,UCB 2) P2O5 3) P3O4 L3-6 Light as a Wave Electromagnetic Radiation Diffraction and Interference :wavelength A A+B B Intensity ~ Probability Distribution Summary c c :speed 700 400 = 400 nm = 700 nm © A.Pines,M.Kubinec,UCB :frequency = c c= 3.0 x 108 m/s 3.0 L6-4 © A.Pines,M.Kubinec,UCB L6-6 Electromagnetic Spectrum 400 500 Visible γ-rays x-rays UV IR MW Radio, NMR, MRI Absorption and Continuous Emission 600 700 nm 10-16 10-12 10-8 © A.Pines,M.Kubinec,UCB 10-4 100 104 108 m L6-5 Line © A.Pines,M.Kubinec,UCB L6-10 Light as a Wave Electromagnetic Radiation c :wavelength :frequency c :speed = c = 400 nm = 700 nm © A.Pines,M.Kubinec,UCB c= 3.0 3.0 x 108 m/s L3-9 © A.Pines,M.Kubinec,UCB 2 Chem 1A L3: "Light: Waves, Absorption, Emission" Electromagnetic Spectrum © A.Pines,M.Kubinec,UCB L3-10 Electromagnetic Spectrum 400 500 Visible γ-rays x-rays UV IR MW Radio,NMR,MRI 600 700 nm 10-16 10-12 10-8 10-4 100 104 108 m © A.Pines,M.Kubinec,UCB L3-11 Diffraction and Interference Intensity ~ Probability Distribution A © A.Pines,M.Kubinec,UCB L3-12 © A.Pines,M.Kubinec,UCB 3 Chem 1A L3: "Light: Waves, Absorption, Emission" Diffraction and Interference Intensity ~ B Probability Distribution © A.Pines,M.Kubinec,UCB L3-13 Diffraction and Interference Intensity ~ A B Probability Distribution © A.Pines,M.Kubinec,UCB L3-14 Diffraction and Interference Intensity A+B ~ Probability Distribution © A.Pines,M.Kubinec,UCB L3-15 © A.Pines,M.Kubinec,UCB 4 Chem 1A L3: "Light: Waves, Absorption, Emission" Constructive and destructive interference of waves © A.Pines,M.Kubinec,UCB L3-16 Diffraction and Interference Intensity A+B ~ Probability Distribution © A.Pines,M.Kubinec,UCB L3-17 ChemQuiz 3.1 How will the two-slit twointerference pattern change upon increase of ? A) © A.Pines,M.Kubinec,UCB B) C) L3-18 © A.Pines,M.Kubinec,UCB 5 Chem 1A L3: "Light: Waves, Absorption, Emission" Absorption and Continuous Emission Line © A.Pines,M.Kubinec,UCB L3-20 ChemQuiz© 3.2 What color is an object with the absorption spectrum shown? A) ~ blue © A.Pines,M.Kubinec,UCB B) ~ green C) ~ red L3-21 3--DImage 3 D Image © A.Pines,M.Kubinec,UCB L3-23 © A.Pines,M.Kubinec,UCB 6 Chem 1A L3: "Light: Waves, Absorption, Emission" 3-D Image © A.Pines,M.Kubinec,UCB L3-24 3-D Image © A.Pines,M.Kubinec,UCB L3-25 Lecture Complete © A.Pines,M.Kubinec,UCB L3-26 © A.Pines,M.Kubinec,UCB 7 ...
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This note was uploaded on 04/24/2010 for the course CHEM 1A taught by Professor Nitsche during the Spring '08 term at University of California, Berkeley.

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