Practice Final Blank 2001

Practice Final Blank 2001 - 1. (6 pts) Given the following...

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1 1. (6 pts) Given the following data at 25 o C: 2 O 3 (g) —> 3 O 2 (g) H o = – 427 kJ O 2 (g) —> 2 O (g) H o = 495 kJ NO (g) + O 3 (g) —> NO 2 (g) + O 2 (g) H o = – 199 kJ Calculate H o for the following reaction at 25 o C: NO (g) + O (g) —> NO 2 (g) 2. (12 pts) Write the reactions that correspond to the following enthalpy changes: a) H f o for solid aluminum oxide. b) The standard enthalpy of neutralization of aqueous sodium hydroxide and hydrochloric acid. c) H f o for gaseous vinyl chloride, C 2 H 3 Cl. d) The enthalpy of solution of solid ammonium bromide. 3. (10 pts) Using the following data: H f o (kJ /mol) S o (J K –1 mol –1 ) N 2 O 5 (g) 11.29 355.3 NO 2 (g) 33.15 239.9 O 2 (g) 0 204.8 Above what temperature is the following reaction spontaneous? 2 N 2 O 5 (g) —> 4 NO 2 (g) + O 2 (g).
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2 4. A sample of pure solid naphthalene (C 10 H 8 ) weighing 0.6410 g is burned completely with oxygen to produce CO 2 (g) and H 2 O (l) in a constant volume calorimeter at 25 o C. The amount of heat released is measured to be 25.79 kJ. a) (4 pts) Write and balance the equation for the combustion reaction. b) (4 pts) Calculate the standard change in internal energy, ∆Ε ο , for the combustion of 1.00 mol naphthalene to produce CO 2 (g) and H 2 O (l). c) (4 pts) Calculate the standard change in enthalpy, ∆Η ο , for the combustion of 1.00 mol naphthalene to produce CO 2 (g) and H 2 O (l).
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Practice Final Blank 2001 - 1. (6 pts) Given the following...

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