Test Form 0

Test Form 0 - FORM #0 Chem 1202 Bonus Final 1 Calculate H...

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FORM #0 ±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±± Chem 1202 Bonus Final ±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±± 1 Calculate H rxn ( for the reaction of B 2 H 6 with oxygen B 2 H 6 ± g   ± 3O 2 ± g   v B 2 O 3 ± s   ± 3H 2 O ± l   From the following enthalpies of reaction: RXN 1. 4B ± s   ± 3O 2 ± g   v 2B 2 O 3 ± s   H ( ² " 2509.1 kJ RXN 2. 2 H 2 ± g   ± O 2 ± g   v 2H 2 O ± l   H ( ² " 571.7 kJ RXN 3. B 2 H 6 ± g   v 2B ± s   ± 3H 2 ± g   H ( ² " 35.4 kJ ( A ) H ( ² " 3116.2 kJ ( B ) H ( ²± 1705.6 kJ ( C ) H ( 2147.5 kJ ( D ) H ( ² " 1705.6 kJ ( E ) H ( ² " 2147.5 kJ 2 Which of the following is the best statement of the first law of thermodynamics? ( A )Thechangeintheentropyofthesystemispositiveforspontaneousprocesses. ( B )Energyisconservedinallchemicalandphysicalprocesses. ( C ) q ² H ( D ) A spontaneous process must have G ³ 0 ( E ) S univ S sys ± S surr 3 The graph below shows the energy during the course of a reaction. Which entry, A-E, in the table correctly identifies the features G, K, H, J in the graph? E a (forward) E a (reverse) E Activated Complex (Transition State) (A) GK J H (B) JH G K (C) GJ H K (D) HK G J (E) H J
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20 40 60 80 100 120 140 160 Product Reactant K J G H Energy (kJ/mol) Reaction Coordinate 4 Choose the correct expression for the equilibrium constant, K c ,forthereaction: 2Fe ± s   ± 3H 2 O ± g   ® Fe 2 O 3 ± s   ± 3H 2 ± g   . ( A ) K c ² [H 2 O] 3 /[H 2 ] 3 ( B ) K c ² [H 2 ] 3 2 O] 3 ( C ) K c ² [Fe] 2 /[Fe 2 O 3 ][H 2 ] 3 ( D ) K c ² [Fe] 2 [H 2 O] 3 2 O 3 2 ] 3 ( E ) K c ² [Fe 2 O 3 2 ]/[Fe][H 2 O] 5 Which of the following is true for the voltaic cell based on the reaction below with E cell ( ²± 1.39 V. 3Ni 2 ± ± aq   ± 2Al ± s   v 3Ni ± s   ± 2Al 3 ± ± aq   ( A )Electronsflowthroughawirefromthecathodetotheanode . ( B )ForthiscellelectronsflowfromAl ± s   to Ni ± s   . ( C )Al ± s   is the cathode. ( D ) The oxidation half reaction occurs at the cathode. ( E )ThereactionNi 2 ± ± 2e " v Ni ± s   occurs at the anode. 6 Calculate the equilibrium constant, K p , at 298 K given G rxn ( ² " 15. 7 kJ for the following reaction.
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H 2 (g) ± I 2 (g) ® 2HI (g) ( A ) K p ² 1. 01 ( B ) K p ² 0.994 ( C ) K p ² 1. 77 ³ 10 " 3 ( D ) K p ² 565. ( E ) K p ² 1. 85 7 Which of the following reactions is the formation reaction for NH 3 ± g   ? ( A )NH 3 ± g   v 1 2 N 2 (g) ± 3 2 H 2 ± g   ( B )N ± g   ± 3H ± g   v NH 3 ± g   ( C 4 ± ± g   v NH 3 ± g   ± H ± ± g   ( D 3 ± g   v N ± g   ± 3H ± g   ( E ) 1 2 N 2 ± g   ± 3 2 H 2 ± g   v NH 3 ± g   8 What is the pH at the equivalence point when 225. mL of 0.77 M HF is titrated with 225.
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This note was uploaded on 05/12/2011 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

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Test Form 0 - FORM #0 Chem 1202 Bonus Final 1 Calculate H...

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