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In the smelting of iron ores, the reduction of iron oxides in a blast furnace is accompanied by the oxidation of CO(o) to CO2lg). The three reactions leading to the formation of Fe are: Reaction (i): 3 Fe,03(s) + CO(g) → 2 Fez04(s) + CO2(g) Reaction (ii): Fe304(s) + CO(g) → 3 FeO(s) + CO2(g) Reaction (iii): FeO(s) + CO(g) - Fe (s) + CO2(g) The graph below shows the variation of the Gibbs energy change with temperature for each of these reactions. Which one of the following statements is INCORRECT? 50 (iii) 40 -50 (ii) -100 -150 1000 2000 T/K O Reaction (iii) is spontaneous at high temperatures. O All of the three reactions are spontaneous at 500 K. O The Keg for Reaction (i) is larger than the Keg for Reaction (ii) at all temperatures. Reactions (i) and (ii) are more favorable at high temperatures. O O O O

In the smelting of iron ores, the reduction of iron oxides in a blast furnace is accompanied by the oxidation of CO(o) to CO2lg). The three reactions leading to the formation of Fe are: Reaction (i): 3 Fe,03(s) + CO(g) → 2 Fez04(s) + CO2(g) Reaction (ii): Fe304(s) + CO(g) → 3 FeO(s) + CO2(g) Reaction (iii): FeO(s) + CO(g) - Fe (s) + CO2(g) The graph below shows the variation of the Gibbs energy change with temperature for each of these reactions. Which one of the following statements is INCORRECT? 50 (iii) 40 -50 (ii) -100 -150 1000 2000 T/K O Reaction (iii) is spontaneous at high temperatures. O All of the three reactions are spontaneous at 500 K. O The Keg for Reaction (i) is larger than the Keg for Reaction (ii) at all temperatures. Reactions (i) and (ii) are more favorable at high temperatures. O O O O

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter21: Chemistry Of The Main-group Elements
Section: Chapter Questions
Problem 21.200QP
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In the smelting of iron ores, the reduction of iron oxides in a blast furnace is accompanied by the oxidation of CO(o) to CO2(9). The three reactions leading to the formation of Fe are: Reaction (i): 3 Fe,03(s) + CO(g) → 2 FezO4(s) + CO2(g) Reaction (ii): Fe304(s) + CO(9) 3 FeO(s) + CO29) Reaction (ii): FeO(s) + CO(a) → Fe (s) + CO2(9) The graph below shows the variation of the Gibbs energy change with temperature for each of these reactions. Which one of the following statements is INCORRECT? 50 (ii) 4G° (ii) -50 -100 (i) -150 1000 2000 T/K O Reaction (iii) is spontaneous at high temperatures. O All of the three reactions are spontaneous at 500 K. O The Keg for Reaction (i) is larger than the Keg for Reaction (ii) at all temperatures. Reactions (i) and (ii) are more favorable at high temperatures.
Transcribed Image Text:In the smelting of iron ores, the reduction of iron oxides in a blast furnace is accompanied by the oxidation of CO(o) to CO2(9). The three reactions leading to the formation of Fe are: Reaction (i): 3 Fe,03(s) + CO(g) → 2 FezO4(s) + CO2(g) Reaction (ii): Fe304(s) + CO(9) 3 FeO(s) + CO29) Reaction (ii): FeO(s) + CO(a) → Fe (s) + CO2(9) The graph below shows the variation of the Gibbs energy change with temperature for each of these reactions. Which one of the following statements is INCORRECT? 50 (ii) 4G° (ii) -50 -100 (i) -150 1000 2000 T/K O Reaction (iii) is spontaneous at high temperatures. O All of the three reactions are spontaneous at 500 K. O The Keg for Reaction (i) is larger than the Keg for Reaction (ii) at all temperatures. Reactions (i) and (ii) are more favorable at high temperatures.
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