Exam 1.Form B.YellowVersion.2008

Exam 1.Form B.YellowVersion.2008 - Chem. 1B Exam 1 February...

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1 Chem. 1B Exam 1 FORM B First letter of your last name: February 1, 2008 Name: Last Name First Name Perm # INSTRUCTIONS: No sharing of calculators. Cell Phones, iPods, headsets, etc. must be turned off and put away. SCANTRON FORM: Use a PENCIL 1) Write your name 2) Bubble in FORM B 3) Bubble in your PERM number (7 digits only, no extra numbers) INFORMATION PAGE: An information page is provided separately. No other notes or books are allowed. There are 5 pages, 16 questions. Each question is worth 5 points. Work out the problems and write your answers on this exam. Turn in the Exam and Scantron form . 1. Consider the following exothermic reaction at 25 o C and 1 atm. 2 NO (g) + O 2 (g) 2 NO 2 (g) For this system at equilibrium, how will raising the temperature affect the amount of NO present? a) The amount of NO will increase b) The amount of NO will decrease Answers are given at the end of the exam. c) The amount of NO will stay the same d) More information is needed to answer this question 2. Consider the following reaction at 25 o C and 1 atm. 2 N 2 O 5 (g) 4 NO 2 (g) + O 2 (g) For this reaction, Δ H o = 110.0 kJ and Δ S o = 453.8 J/K. Which of the following statements are correct? a) The reaction is spontaneous at 25 o C b) The reaction is spontaneous as long as T Δ S < Δ H c) The reaction is spontaneous as long as T Δ S > Δ H d) Statements (a) and (b) are both correct e) Statements (a) and (c) are both correct
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Exam 1.Form B.YellowVersion.2008 - Chem. 1B Exam 1 February...

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