CO (g) -110.5 -37.2 197.9 CO2 (g) -393.5 -394.4 213.6 Hydrogen H2 (g) 0 0 130.58 Oxygen O2 (g) 0 0 205.0 H2O (l) -258.83 -237.13 69.91 The value of for the catalytic hydrogenation of acetylene to ethene, ΔS˚ C2H2 (g) + H2(g) C2H4(g) → is __________ J/K∙mol. A) +18.6 B) +550.8 C) +112.0 D) -112.0 E) -18.6 The combustion of acetylene in the presence of excess oxygen yields carbon dioxide and water: 2C2H2 (g) +5O2 4CO2(g) 2H2O(l) → The value of for this reaction is __________ J/K∙mol. ΔS˚ A) +689.3 B) +122.3 C) +432.4 D) -122.3 E) -432.4 The value of for the oxidation of carbon to carbon dioxide, ΔS˚ C(s graphite) +O2(g) CO2(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 The combustion of ethane in the presence of excess oxygen yields carbon dioxide and water: 2C2H6(g) + 7O2(g) 4CO2(g) + 6H2O(l) →
CO (g) -110.5 -37.2 197.9 CO2 (g) -393.5 -394.4 213.6 Hydrogen H2 (g) 0 0 130.58 Oxygen O2 (g) 0 0 205.0 H2O (l) -258.83 -237.13 69.91 The value of ΔS˚ for the catalytic hydrogenation of acetylene to ethene, C2H2 (g) + H2(g) → C2H4(g) is __________ J/K∙mol. A) +18.6 B) +550.8 C) +112.0 D) -112.0 E) -18.6 The combustion of acetylene in the presence of excess oxygen yields carbon dioxide and water: 2C2H2 (g) +5O2 → 4CO2(g) 2H2O(l) The value of ΔS˚ for this reaction is __________ J/K∙mol. A) +689.3 B) +122.3 C) +432.4 D) -122.3 E) -432.4 The value of ΔS˚ for the oxidation of carbon to carbon dioxide, C(s graphite) +O2(g) → CO2(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 The combustion of ethane in the presence of excess oxygen yields carbon dioxide and water: 2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(l)
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