Ch05_thermodynamic chemistry.pdf - General Chemistry A Multiple-Choice Questions Chapter 5 Thermodynamic chemistry and Bimodal Use the table below to

Ch05_thermodynamic chemistry.pdf - General Chemistry A...

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General Chemistry Chapter 5: Thermodynamic chemistry 1 | P a g e L . M V i e n A. Multiple-Choice and Bimodal Questions Use the table below to answer the questions that follow. 5. 1. The value of S   for the catalytic hydrogenation of acetylene to ethene, 2 2 2 2 4 C H (g) H (g) C H (g) is __________ J/K∙ mol. a. +18.6 b. +550.8 c. +112.0 d. -112.0 e. -18.6 5. 2. The combustion of acetylene in the presence of excess oxygen yields carbon dioxide and water: 2 2 2 2 2 2C H (g) 5O 4CO (g) 2H O(l) The value of S   for this reaction is __________ J/K∙ mol. a. +689.3 b. +122.3 c. +432.4 d. -122.3 e. -432.4 5. 3. The value of S   for the reaction 2 2C(s,diamond) O (g) 2CO(g) is __________ J/K∙ mol. a. -185.9 b. +185.9 c. -9.5 d. +9.5 e. -195.7 5. 4. The value of S   for the catalytic hydrogenation of ethene to ethane, 2 4 2 2 6 C H (g) H (g) C H (g) is __________ J/K∙ mol. a. -101.9 b. -120.5 c. -232.5 d. +112.0 e. +101.9 5. 5. The value of S   for the catalytic hydrogenation of acetylene to ethane 2 2 2 2 6 C H (g) 2H (g) C H (g) is __________ J/K∙ mol. a. -76.0 b. +440.9 c. -232.5 d. +232.5 e. +28.7 5. 6. The value of S   for the oxidation of carbon to carbon monoxide, 2 2C(s,graphite) O (g) 2CO(g) is __________ J/K∙ mol. Carbon monoxide is produced in the combustion of carbon with limited oxygen. a. -12.8 b. +408.6 c. -408.6 d. +179.4 e. +395.8 5. 7. The value of S   for the oxidation of carbon to carbon dioxide, 2 2 C(s,graphite) O (g) CO (g) is __________ J/K∙ mol. The combustion of carbon, as in charcoal briquettes, in the presence of abundant oxygen produces carbon dioxide. a. +424.3 b. +205.0 c. -205.0 d. -2.9 e. +2.9
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General Chemistry Chapter 5: Thermodynamic chemistry 2 | P a g e L . M V i e n 5. 8. The combustion of ethene in the presence of excess oxygen yields carbon dioxide and water: 2 4 2 2 2 C H (g) 3O (g) 2CO (g) 2H O(l) The value of ΔS° for this reaction is __________ J/K∙ mol. a. -267.4 b. -140.9 c. -347.6 d. +347.6 e. +140.9 5. 9. The combustion of ethane in the presence of excess oxygen yields carbon dioxide and water: 2 6 2 2 2 2C H (g) 7O (g) 4CO (g) 6H O(l) The value of S   for this reaction is __________ J/K∙ mol. a. +718.0 b. -620.1 c. -718.0 d. -151.0 e. +151.0 5. 10. The combustion of hydrogen in the presence of excess oxygen yields water: 2 2 2 2H (g) O (g) 2H O(l) The value of S   for this reaction is __________ J/K∙ mol. a. +405.5 b. -405.5 c. -326.3 d. -265.7 e. +265.7 Use the table below to answer the questions that follow. 5. 11. The value of S   for the oxidation of solid elemental sulfur to gaseous sulfur trioxide, 2 3 2S(s,rhombic) 3O (g) 2SO (g) is __________ J/K mol. a. +19.3 b. -19.3 c. +493.1 d. -166.4 e. -493.1 5. 12. The value of S   for the oxidation of solid elemental sulfur to gaseous sulfur dioxide, 2 2 S(s,rhombic) O (g) SO (g) is __________ J/K∙ mol. a. +485.4 b. +248.5 c. -11.6 d. -248.5 e. +11.6 5. 13. The value of S   for the decomposition of gaseous sulfur trioxide to solid elemental sulfur and
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General Chemistry Chapter 5: Thermodynamic chemistry 3 | P a g e L . M V i e n gaseous oxygen, 3 2 2SO (g) 2S(s,rhombic) 3O (g) is __________ J/K∙ mol.
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  • Spring '16
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