Chemistry 1A - Spring 2008 - Nitsche - Midterm 1 Solutions

Chemistry 1A - Spring 2008 - Nitsche - Midterm 1 Solutions...

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Unformatted text preview: Chemistry 1A, Spring 2008 Midterm Exam I, Version 1 Feb. 11, 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.) Some questions may require selecting more than one answer to receive credit. 5.) Show all work to receive credit on short answer questions. Question Points MC /60 #16 /15 #17 /10 #18 /15 TOTAL /100 Name_______________________________ Page 2 800 600 400 200 IR Red Green Blue UV Wavelength (nm) Color and Wavelength of Light G = H - T S H = H f (products) - H f (reactants) S = S (products) - S (reactants) G = G f (products) - G f (reactants) S = k B lnW G = - RTln K R S T R H K + = 1 ln G = - nF pX = - log X ] [ ] [ log HA A pK pH a + = E = h = c deBroglie = h / p = h / mv E kin (e-) = h - = h - h 0 = R n Z E n 2 2 E i f = R 1 n f 2 1 n i 2 x p h/4 p = mv Particle in a box (1-D Quantum): E n = h 2 n 2 /8mL 2 ; n = 1, 2, 3... PV = nRT RT E kin 2 3 = M 3RT v rms = E = q + w w = - P ext V E = 3 2 nR T N = 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 Name_______________________________ Page 3 Multiple Choice Questions (4 Points Each) 1) In class you observed the combustion of butane (C 4 H 10 ). What is the coefficient of oxygen in the balanced chemical equation of two moles of butane? 2C 4 H 10 (g) + O 2 (g) CO 2 (g) + H 2 O (l) Answer: 2C 4 H 10 (g) + 13O 2 (g) 8CO 2 (g) + 10H 2 O (l) A) 2 B) 10 C) 7 D) 13 E) 5 2) In lab, the reaction of acetic acid and sodium bicarbonate produced CO 2 (g) to inflate your airbag....
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Chemistry 1A - Spring 2008 - Nitsche - Midterm 1 Solutions...

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