Chemistry 1A - Spring 2007 - Nitsche - Midterm 3 Solutions

Chemistry 1A- - Chemistry 1A Spring 2007 Midterm Exam 3 April 9 2007(90 min closed book Name_KEY SID TA Name 1 2 3 4 Write your name on every page

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Page 1 Chemistry 1A, Spring 2007 Midterm Exam 3 April 9, 2007 (90 min, closed book) Name:__________KEY____________ SID:____________________________ TA Name:_______________________ 1.) Write your name on every page of this exam. 2.) This exam has 34 multiple choice 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 bubbling in more than one choice to receive credit.
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Name_________________________ Page 2 800 600 400 200 IR Red Green Blue UV Wavelength (nm) Color and Wavelength of Light ' 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 ' G q = - RTln K R S T R H K q ' ± q ' ² 1 ln ' G q = - nF ' ȯ º pX = - log X ] [ ] [ log HA A pK pH a ² ± 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 ¨ p ~ h 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 T nR E ' ' 2 3 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 = 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 C p (water) = 4.184 kJ/ o C·g
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N a m e _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ P a g e 3 1.) A mixture of 1.00 g of H 2 and 1.00 g of He exerts a pressure of 0.480 atm. What is the partial pressure of each gas in the mixture? A) P H2 = 0.240 atm P He = 0.240 atm B) P H2 = 0.320 atm P He = 0.160 atm C) P H2 = 0.160 atm P He = 0.320 atm D) P H2 = 0.384 atm P He = 0.096 atm E) P H2 = 0.096 atm P He = 0.384 atm 2.) Consider the balanced reaction for the combustion of octanol: C 8 H 18 O (g) + 12 O 2 (g) o 8 CO 2 (g) + 9 H 2 O (g) What volume of carbon dioxide gas will be produced from 5.00 g of octanol and a stoichiometric amount of oxygen if the reaction is carried out at 28 o C and 0.984 atm? A) 0.308 L B) 6.89 L C) 7.72 L D) 8.69 L E) 0.966 L 3.) Which change(s) in a sample of ideal gas would have the same effect on the pressure as increasing the velocity of the particles? Mark all that apply. A) Increase in temperature. B) Increase in volume. C) Decrease in pressure D) Increase in the number of moles of gas. E) None of these. 4.) What is the pressure required to compress a 1.00 L sample of air at 1.00 atm to 0.400 L at 25°C? A) 1.0 atm B) 1.5 atm C) 2.0 atm D) 2.5 atm E) 3.0 atm
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N a m e _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ P a g e 4 For the next three questions, consider four flasks filled with 1.0 mol of different gasses: Flask A: O 2 at 760 torr and 10 o C.
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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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Chemistry 1A- - Chemistry 1A Spring 2007 Midterm Exam 3 April 9 2007(90 min closed book Name_KEY SID TA Name 1 2 3 4 Write your name on every page

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