In the smelting of iron ores, the reduction of iron oxides in a blast furnace is accompanied by the oxidation of COg) to COzg)- The three reactions leading to the formation of Fe are: Reaction (i): 3 Fez031) + CO g) - 2 Fej04e) + CO2(9) Reaction (ii): Fe,O4(a) + CO(g) - 3 FeO(e) + CO2(g) Reaction (ii): Fe0(4) + CO(g) - Fe (s) + C02(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 (i) -150 1000 2000 TIK O All of the three reactions are spontaneous at 500 K. Reactions (i) and (i) are more favorable at high temperatures. O The Keg for Reaction (i) is larger than the Keg for Reaction (ii) at all temperatures. Reaction (iii) is spontaneous at high temperatures.

In the smelting of iron ores, the reduction of iron oxides in a blast furnace is accompanied by the oxidation of COg) to COzg)- The three reactions leading to the formation of Fe are: Reaction (i): 3 Fez031) + CO g) - 2 Fej04e) + CO2(9) Reaction (ii): Fe,O4(a) + CO(g) - 3 FeO(e) + CO2(g) Reaction (ii): Fe0(4) + CO(g) - Fe (s) + C02(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 (i) -150 1000 2000 TIK O All of the three reactions are spontaneous at 500 K. Reactions (i) and (i) are more favorable at high temperatures. O The Keg for Reaction (i) is larger than the Keg for Reaction (ii) at all temperatures. Reaction (iii) is spontaneous at high temperatures.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

In the smelting of iron ores, the reduction of iron oxides in a blast furnace is accompanied by the oxidation of COg) to CO2g)- The three reactions leading to the formation of Fe are:
Reaction (i): 3 Fe,03e) + CO(g) - 2 Fe,04e) + CO2(9)
Reaction (ii): Fe,04(a) + CO(g) - 3 FeO(e) + CO2(g)
Reaction (ii): FeO(e) + CO(g) - Fe (s) + CO29)
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
(i)
-150
1000
2000
T/K
O All of the three reactions are spontaneous at 500 K.
Reactions (i) and (i) are more favorable at high temperatures.
O The Keg for Reaction (i) is larger than the Kug for Reaction (ii) at all temperatures.
Reaction (ii) is spontaneous at high temperatures.

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