chemChem 1A-spring08-mt3-Nitsche-soln

chemChem 1A-spring08-mt3-Nitsche-soln - Chemistry 1A,...

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Chemistry 1A, Spring 2008 Midterm Exam III, Version A April 14, 2008 (90 min, closed book) Name:____ KEY ___________ SID:____________________________ TA Name:_______________________ 1.) Write your name on every page of this exam. 2.) This exam has 15 multiple-choice questions and 3 short answer 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.) Select one answer for each multiple choice question. 5.) Show all work to receive credit on short answer questions. Question Page Points Score Multiple Choice 3-5 60 16) Phase Changes 6-7 14 17) Thermodynamics 8 14 18) Equilibria 9 12 Total 100
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Name_______________________________ Page 2 800 600 400 200 IR Red Green Blue UV Wavelength (nm) Color and Wavelength of Light ± G ° = ± H ° - T ± S ° ± H ° = ² ± H ° f (products) - ² ± H ° f (reactants) ± S ° = ² S ° (products) - ² S ° (reactants) ± G ° = ² ± G ° f (products) - ² ± G ° f (reactants) S = k B lnW Bond Order = (# of bonding electrons - # of anti- bonding electrons) ÷ 2 ± G ° = - RTln K R S T R H K ° ± + ° ± ² = 1 ln ± G ° = - nF ± ± º pX = - log X ] [ ] [ log HA A pK pH a ± + = Heat Capacity of H 2 O(l) = 4.184 Jg -1 K -1 Density of water = 1.00 g/mL For y = ax 2 +bx+c, x = ± b ± 2 ± 4 ac 2 a E = h ³ ´³ = c ´ deBroglie = h / p = h / mv E kin (e-) = h ³ - µ = h ³ - h ³ 0 ± ² = R n Z E n 2 2 E i ± f = ² R ³ 1 n f 2 ² 1 n i 2 ´ µ · ¸ ¹ ¹ ² x ² p ³ h/4 p = mv Particle in a box (1-D Quantum): E n = h 2 n 2 /8mL 2 ; n = 1, 2, 3. .. PV = constant PV = nRT RT E kin 2 3 = M 3RT v rms = ± E = q + w w = - P ext ± V ± E = 3 2 nR ± T 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 1 atm = 760 mmHg = 760 torr = 101,325 Pa 1 atm L = 101.3 J
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Name_______________________________ Page 3 Multiple Choice Questions (4 points each) 1) Which of the following gases would you expect to behave least like an ideal gas? A) He B) CO 2 C) H 2 O D) Xe E) Br 2 2) Using the diagram below, which of these is a plot of the vapor pressure of water vs. temperature? 3) A system absorbs 716 kJ of heat and does 598 kJ of work on the surroundings. What is the change in internal energy of the system? A) 1314 kJ B) 118 kJ C) -118 kJ D) -1314 kJ E) 598 kJ 4) When breathing, the average human lung expands by 0.50 L. If this expansion occurs against an external pressure of 1.0 atm, how much work is done by the system?
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This note was uploaded on 02/17/2010 for the course BIOE 100 taught by Professor Budinger during the Spring '10 term at University of California, Berkeley.

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chemChem 1A-spring08-mt3-Nitsche-soln - Chemistry 1A,...

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