chem1a-spring07-mt2-blank

chem1a-spring07-mt2-blank - Chemistry 1A Spring 2007...

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Chemistry 1A, Spring 2007 Midterm Exam 2 March 5, 2007 (90 min, closed book) Name:___________KEY____________ SID:____________________________ TA Name:_______________________ 1.) Write your name on every page of this exam. 2.) This exam has 40 multiple choice questions. Fill in the Scantron form AND circle your answer on the exam. 3.) There is no penalty for guessing, so answer every question. 4.) Some questions may require bubbling in more than one choice to receive credit. Page 1 Name_________________________ 800600 400 200IR Red Green Blue UV Wavelength (nm) Color and Wavelength of Light ΔG° = ΔH° - TΔS° ΔH° = Σ ΔH° f (products) - Σ ΔH° f (reactants) ΔS° = Σ S° (products) - Σ S° (reactants) ΔG° = Σ ΔG° f (products) - Σ ΔG° f (reactants) S = k B lnW ΔG° = - RTln K RSTRHK °Δ+°Δ−=1ln ΔG° = - nFΔЄº pX = - log X ][][log HAApKpH a += E = hν λν = c λ deBroglie = h / p = h / mv E kin (e-) = hν - Φ = hν - hν 0 −= RnZE n 22 Δx Δp ~ h p = mv Particle in a box (1-D Quantum): E n = h 2 n 2 /8mL 2 ; n = 1, 2, 3... PV = nRT RTE kin 23= M3RTv rms = ΔE = q + w w = - P ext ΔV TnRE Δ=Δ23 N 0 = 6.02214 x 10 23 mol -1 R = 2.179874 x 10 -18 J R = 3.28984 x 10 15 Hz k = 1.38066 x 10 -23 J K -1 h = 6.62608 x 10 -34 J s m e = 9.101939 x 10 -31 kg c = 2.99792 x 10 8 m s -1 Gas Constant: R = 8.31451 J K -1 mol -1 R = 8.20578 x 10 -2 L atm K -1 mol -1 T (K) = T (C) + 273.15 F = 96,485 C / mol 1 V = 1 J / C 1 nm = 10 -9 m 1 kJ = 1000 J Page 2 Name_________________________
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S ECTION  1: Q UANTUM  M ECHANICS AND  A TOMIC  T HEORY  1.) Which of the following lists the sizes of the 1s orbitals for each species from smallest to largest? A) H<He + <Li 2+ <C 5+ <Fe 25+ B) Fe 25+ <C 5+ <Li 2+ <He + <H C) Fe 25+ <He + <Li 2+ < C 5+ <H D) H<He + < C 5+ <Fe 25+ <Li 2+ E) Need more information. 2.) Which of the following will become more paramagnetic upon ionization to form a +1 ion? Mark all that apply. A) N B) Ni C) Te D) Ba E) Hg 3.) From which orbital must an electron be removed from the Sr 2+ ion in its ground state to form Sr 3+ ?
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