20a1mt2k - Chemistry 20A Fall Quarter Midterm(II Nov 24...

Unformatted text preview: Chemistry 20A Fall Quarter Midterm (II), Nov. 24, 2004 Name: KEV‘ Section Day/Time: TA: Student ID #: Mfi Problem 1 (60pts.): Problem 2 (40pts.): . ____________________.___.__———-——-—-——— Problem 3 (60pts.): Mun .17 : .. Problem 4 (40pts.): “'____.__—————-————-——-—‘—‘——"——_ .;.. Total Score: D 60 pts. A) What is the Pauli exclusion principle? B) _ What is the Born—Oppenheimer approximation? C) What do the letters in the acronym LASER represent? D) What is the Aufbau principle? B) What is Hunds Rule? F) n=3 (i=1 corresponds to What orbital? ”)3 Q Pt ) m ”.2 e ’39 Mam WV» W SOMV W‘ 0+ $5M“ N” #/4 at”, ”L (3 DA guy-2., {ppm «WW/y “"4 MM?) ilk“ 84"”? Z 2' ‘/ $.5va Mn 5;); W. a&- .4".Jv\ SA? M h h/K, @OW S?/"5 r / :"W’," Huru 2" \\ M2467. |v\ “9"“- , {1/7 fjcwct/mxfl 44‘6““? 0““,th 4/“ “Wit” ”” inc/Km harm, LWnfi 26") ‘ ,« L) Lang Amr‘hqfimm a"? Sumemw {la/“8.3,“; 0+ Lollahk D) 1/,” Q’l’l‘a’va Ul/"b‘hr(> owl an I "" bC‘lenhthj Lg, 0%‘11‘ f, , r} (”N-lupin .n3 V9 , A M9\X O'f‘ Q ( "<5 w/ 0 (Qt/M 0M7?) ‘ Jp?;§\l’( (5(7“ 1/: I‘l’l {ax/V (ABC/7W 9:) 4% E) Velma“ 6:cl(&\:;\3 e") in cvlovl'zl‘) 3+ (’7 U-M «(N’Vl/v H tmu ~01 ~ ' i / L / / I i {k 2 am} Wt? (A?! WWM 639‘“) LA“ } ’” *‘K €77? (”A’s Wx évA Orlo «H l . 0a afi,%“<> H) 40 pts. A8 Me: A) Construct an orbital correlation diagram for the molecule He; B) Construct and sketch the corresponding LCAO wavefunctions for the occupied levels? (26 Wsfi 63‘“. ls / \s 073% He He, 6% “‘5 (20 m3 A Q ts III) 60 pts. The hydrogen atom (H) and its isotope deuterium (D) differ only in their mass 2mH=mD). The vibrational frequency for H2 in inverse wavelength is c0=4000 cm'l. 25 A) What is co for D2? 25 B) Sketch the potential curve for H2 and D2 showing the first 3 vibrational energy levels, with quantum numbers for each molecule. D2 has the same potential energy curve as H2. I0 C) The potential energy minimum for H2 is 4.75 eV, what is the dissociation energy for D2. (leV= 8065cm'1). Sketch the potential showing probability density in the first 3 energy levels. , I" , .2 A) w -.-:=4/a #an Lw 39303.19 ow' ”“ mm) : 1%28 cw" bubs) : 39,309 «2828 : 3648mm 1+9")th 2 /" F 1 l :vw L 344-)- II 40 pts. A) Construct the MO diagram for NO. B) Is the molecule paramagnetic or diamagnetic? A) 51 ‘ L30 m3 29 TV TV; 7-?Jr—1— 2? 2s LR... 25 / 2.5 47/ N 61$ o B?) ?Ammncw€mc -— m -+o weird W (IoPEB ...
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