1311ex2_f05 - k = 1.3807 x 10-23 J K-1 R = 0.082057 l atm...

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NaCl unit cell k = 1.3807 x 10 -23 J K -1 R = 0.082057 l atm mol -1 K -1 = 8.314 J mol -1 K -1 = 1.987 cal mol -1 K -1 k = R/N A N A = 6.022 x 10 23 mol -1 1 kcal = 4.184 kJ c = 2.998 x 10 8 m s -1 c = λν E = -13.6(Z/n) 2 eV 1 eV = 1.6022 x 10 -19 J 1 eV = 96.485 kJ mol -1 E = h ν χ = (IE+EA)/2 Δ E = -2.18 x 10 -8 J (Z 2 ) (1/n 2 f - 1/n 2 i ) E = -me 4 Z 2 /8 ε o n 2 h 2 E= mc 2 λ = h/mv 1 nm = 10 -9 m 1 D = 10 -8 cm = 100 pm ε o = 8.85 x 10 -12 J -1 C 2 m -1 4 πε o = 1.113 x 10 -10 C 2 J -1 m -1 U % N A Z + Z - e 2 M/r o Δ G = Δ H - T Δ S = -RTlnK r + /r & cubic 0.732 octahedral 0.414 tetrahedral 0.225 trigonal 0.15 ccp has 2 tetrahedral holes and 1 octahedral hole per sphere coordination no. structure cation, anion M NaCl 6,6 1.748 CsCl 8,8 1.763 ZnS 4,4 1.638 CaF 2 8,4 2.519
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s s p p σ s σ s * σ p σ p * π π * σ sp s s p p σ sp * σ ps σ ps * π π * E E E s s p p σ 1 σ 2 σ 3 σ 4 π π * Molecular orbital energy level diagram for BeH 2 and drawing of molecular orbitals σ 4 σ 3 σ 2 σ 1 π n p s E s N 1 + N 2 N 1 - N 2 x z F 1 F 2 F 3 F 4 x z B n
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Name_______________________________________ Chem 1311 Second Exam 12 October 2005 In taking this examination, you are agreeing to adhere to the GT academic honor code. At a minimum this requires that you utilize only the materials supplied to you, and that you do not give help to, or accept help from, others. No electronic devices, including calculators, are allowed for this exam. 1. (12) Lithium metal reacts with gaseous oxygen to produce lithium peroxide, Li 2 O 2(s) . The reaction representing the standard heat of formation is 2 Li (s) + O 2(g) 6 Li 2 O 2(s) .
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