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Unformatted text preview: silva (jrs4378) Sample Exam Four Shear (52375) 1 This print-out should have 27 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. DrRuth says: In all cases, select the answer that BEST answers the question asked. Read the whole thing first and plan which to answer first because you feel confident about them. Notice the harder ones and save them up till last so you dont use up all your time working on them. Shear 52375 1 L atm = 101.325 J 1 cal = 4.184 J R = see back of answer sheet 001 10.0 points An isolated system can only exchange energy with the surroundings. 1. True 2. False 002 10.0 points Which one of the following thermodynamic quantities is NOT a state function? 1. internal energy 2. work 3. enthalpy 4. free energy 5. entropy 003 10.0 points Which of the following statements does NOT concern the First Law of Thermodynamics? 1. The energy of the universe is constant. 2. Energy can be transformed but never made from scratch. 3. Spontaneous changes lead to more uni- versal disorder. 4. Energy cannot be created nor destroyed. 004 10.0 points You have a 12 oz. can (355 mL) of beer. You test the temperature and see that it reads 0 C. Now this isnt just any beer; this is Guinness and youve heard that Guinness is best at room temperature (20 C). If the specific heat of Guinness is 4.186 J / g C, how much heat should you add in order to raise the tempera- ture? The density of Guinness is 1.2 g/mL. 1. 35.6 kJ 2. 83 J 3. 33.6 kJ 4. 33.6 J 005 10.0 points Which of O 2 (g) , O 2 ( ) , H 2 (g) , H 2 ( ) , H 2 O(g) , H 2 O( ) have a heat of formation equal to zero? 1. O 2 (g), O 2 ( ), H 2 (g), H 2 ( ), H 2 O(g), H 2 O( ) 2. All of them, but only at absolute zero 3. O 2 (g), H 2 (g) 4. O 2 (g), H 2 (g), H 2 O(g) 5. O 2 (g), O 2 ( ), H 2 (g), H 2 ( ) 006 10.0 points Which of the following reactions as written corresponds to a heat of formation reaction? 1. 2 H 2 (g) + O 2 (g) 2 H 2 O( ) 2. CO 2 (s) CO 2 (g) silva (jrs4378) Sample Exam Four Shear (52375) 2 3. Na(s) + 1 2 Cl 2 (g) NaCl(s) 4. SO 2 (g) + 1 2 O 2 (g) SO 3 (g) 007 10.0 points A 0.10 g piece of chocolate cake is combusted with oxygen in a bomb calorimeter. The tem- perature of 4000 g of H...
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This note was uploaded on 08/27/2011 for the course CHEM 301 taught by Professor Wandelt during the Spring '08 term at University of Texas at Austin.
- Spring '08