CHEM 1A MT3 04-13-09 - Chemistry 1A, Spring 2009 Midterm 3...

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Page 1 of 12 Chemistry 1A, Spring 2009 Midterm 3 April 13, 2009 (90 min, closed book) Name:___________________ SID:_____________________ TA Name:________________ x There are 20 Multiple choice questions worth 3 points each. x There are 3, multi-part short answer questions. x For the multiple choice section, fill in the Scantron form AND circle your answer on the exam. x Put your written answers in the boxes provided. Full credit cannot be gained for answers outside the boxes provided. x The lecture, homework, chemquizzes, discussion or experiment that each question is based upon is listed after the question e.g. [L3, HW 1.13, CQ 7.3] Question Points Score Multiple Choice Section 60 Question 2 ±² . DQG ǻ* 8 Question 22, Multiple K 13 Question 23abc, Haber 9 Question 23defg, Haber 10 Total 100
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Page 2 of 12 Thermodynamics: ' G q = ' H q - T ' S q ' H q = 6 ' H q f (products) - 6 ' H q f (reactants) ' S q = 6 S q (products) - 6 S q (reactants) ' G q = 6 ' G q f (products) - 6 ' G q f (reactants) S = k B lnW ' S = q rev /T ' E = q + w w = - P ext ' V for aA + bB cC + dD b a d c B A D C Q ] [ ] [ ] [ ] [ At equilibrium, Q = K ' G = ' G q + RTln Q * *± ² 57OQ³D´µ D DFWLYLW\ Ȗ3¶3± RU Ȗ>$@¶>$@± ' G q = - RTln K ' G q = - nF ' ȯ º ' ȯ = ' ȯ º - (RT/nF) lnQ R S T R H K q ' ± q ' ² 1 ln ¨ T = ik b,f m Ȇ L057 P total = P A + P B = X A P A ° + X B P B ° Acid Base: pH = - log[H 3 O + ] pX = - log X ] [ ] [ log HA A pK pH a ² ± Kinetics: [A] t = [A] 0 e -kt ln[A] t = ln[A] 0 – kt Quantum: E = h Q OQ = c O deBroglie = h / p = h / mv E kin (e-) = h Q - ) = h Q - h Q 0 f ² R n Z E n 2 2 ¨ x ¨S a K p = mv Particle in a box (1-D Quantum): E n = h 2 n 2 /8mL 2 ; n = 1, 2, 3. .. Vibrational: E v ³Y ² ò´ K$¶·ʌµ $ ³N¶P´ ½ Rotational: E n Q³Q ² ¸´ K%µ % K¶¹ʌ 2 I; I = 2mr 2 m = m A m B /(m A + m B ) Ideal Gas: PV = nRT Constants: N 0 = 6.02214 x 10 23 mol -1 R f = 2.179874 x 10 -18 J R f = 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 = 101939 x 10 -31 kg c = 2.99792 x 10 8 m s -1 T (K) = T (C) + 273.15 F = 96,485 C / mol 1 V = 1 J / C Gas Constant: R = 8.31451 J K -1 mol -1 R = 8.20578 x 10 -2 L atm K -1 mol -1 1 nm = 10 -9 m
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Page 3 of 12 M ULTIPLE C HOICE One mole each of gaseous He, CO 2 and NH 3 are placed in a sealed container. The volume of the container is initially 20 L and the temperature is 298K. 1) Which gas has the lowest kinetic energy? [CQ 20.1] A) He B) CO C) NH 2 D) they are all the same 3 2) Which gas has the most frequent number of collisions with the container walls? [HW 72] A) He B) CO C) NH 2 D) they are all the same 3 3) If the container volume was reduced to 50 mL, which of the gases is most likely to still
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This note was uploaded on 04/12/2011 for the course CHEM 1A taught by Professor Nitsche during the Spring '08 term at University of California, Berkeley.

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CHEM 1A MT3 04-13-09 - Chemistry 1A, Spring 2009 Midterm 3...

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