Ex-2-3530-S10

Ex-2-3530-S10 - CHEM 3530 - Exam 2 March 5, 2010 (66) PART...

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CHEM 3530 - Exam 2 – March 5, 2010 (66) PART I. MULTIPLE CHOICE (Circle the ONE correct answer) 1. For the reaction, 2 SO 3 (g) 2 SO 2 (g) + O 2 (g), Δ H o = +200 kJ. The Enthalpy of Formation of SO 3 (g) is –397 kJ/mol. What is the Enthalpy of Formation of SO 2 (g)? (A) +497 kJ (B) 297 kJ (C) -497 kJ (D) -297 kJ 2. For the reaction, 2 NO(g) + O 2 (g) 2 NO 2 (g), Δ H = -114 kJ. Therefore, for the reaction 3 NO 2 (g) 3 NO(g) + (3/2) O 2 (g), Δ H is: (A) +171 kJ (B) +114 kJ (C) +76 kJ (D) -171 kJ 3. The Enthalpy of Combustion of a triglyceride (M=340 g/mol) is -1.1x10 4 kJ/mol. The Dietary Value (aka Nutritional Value) of this triglyceride is (A) 135 kcal/g (B) 7.7 kcal/g (C) 32 kcal/g (D) -7.7 kcal/g 4. For the reaction, 2 CH 3 OH(l) + 3 O 2 (g) 2 CO 2 (g) + 4 H 2 O(l) Δ H = -1450 kJ, which one of the following statements is incorrect? (A) Δ H for forming one mole of H 2 O(l) from CH 3 OH(l) and O 2 (g) is -362.5 kJ (B) Δ H for production of ½ mole of CH 3 OH(l) from CO 2 2 O(l) is +362.5 kJ (C) The enthalpy of formation of CH 3 OH(l) is +725 kJ/mol (D) The enthalpy of formation of O 2 (g) is 0 kJ/mol 5. Which of the following processes/reactions are endothermic ? (i) sublimation, (ii) deposition, (iii) condensation, (iv) fusion (A) i & iii & iv (B) ii & iii (C) i & iv (D) iv only 6. The entropy change is +237 J/K for the reaction: 2 HgO(s) 2 Hg(l) + O 2 (g). The standard molar entropies of HgO(s) and Hg(l) are 70 J/mol-K and 86 J/mol-K. Therefore, the standard molar entropy of O 2 (g) is: (A) 205 J/mol-K (B) 0 J/mol-K (C) 221 J/mol-K (D) 269 J/K 7. The constant pressure molar heat capacity of N 2 (g) is 29.1 J/mol-K. What is the
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Ex-2-3530-S10 - CHEM 3530 - Exam 2 March 5, 2010 (66) PART...

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