Chemistry by OpenStax (2015-05-04)
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN: 9781938168390
Author: Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher: OpenStax
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Chapter 19, Problem 8E

The following reactions all occur in a blast furnace. Which of these are redox reactions?

(a) 3 Fe 2 O 3 ( s ) + CO ( g ) 2 Fe 3 O 4 ( s ) + CO 2 ( g )

(b) Fe 3 O 4 ( s ) + CO ( g ) 3 FeO ( s ) + CO 2 ( g )

(c) FeO ( s ) + CO ( g ) Fe ( l ) + CO 2 ( g )

(d) C ( s ) + O 2 ( g ) CO 2 ( g )

(e) C ( s ) + CO 2 ( g ) 2 CO ( g )

(f) CaCO 3 ( s ) CaO ( s ) + CO 2 ( g )

(g) CaO ( s ) + SiO 2 ( s ) CaSiO 3 ( l )

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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.
In the smelting of iron ores, the reduction of iron oxides in a blast furnace is accompanied by the oxidation of CO(g) to CO2(g). The three reactions leading to the formation of Fe are: Reaction (i): 3 Fe,03(s) + CO(g) → 2 Fe304(s) + CO2(9) Reaction (ii): Fe3O4(s) + CO(g) → 3 FeO(s) + CO2(9) 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) (ii) -50 -100 (i) -150 1000 2000 T/K O Reaction (iii) is spontaneous at high temperatures. OAll of the three re ons 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.

Chapter 19 Solutions

Chemistry by OpenStax (2015-05-04)

Ch. 19 - Iron (II) can be oxidized to iron (III) by...Ch. 19 - How many cubic feet of air at a pressure of 760...Ch. 19 - Find the potentials of the following...Ch. 19 - A 2.5624-g sample of a pure solid alkali metal...Ch. 19 - The standard reduction potential for the reaction...Ch. 19 - Predict the products of each of the following...Ch. 19 - Predict the products of each of the following...Ch. 19 - Describe the electrolytic process for refining...Ch. 19 - Predict the products of the following reactions...Ch. 19 - What is the gas produced when iron(II) sulfide is...Ch. 19 - Predict the products of each of the following...Ch. 19 - Balance the following equations by...Ch. 19 - Dilute sodium cyanide solution is slowly dripped...Ch. 19 - Predict which will be more stable, [CrO4]2- or...Ch. 19 - Give the oxidation state of the metal for each of...Ch. 19 - Indicate the coordination number for the central...Ch. 19 - Give the coordination numbers and write the...Ch. 19 - Give the coordination number for each metal ion in...Ch. 19 - Sketch the structures of the following complexes....Ch. 19 - Draw diagrams for any Cis, trans, and optical...Ch. 19 - Name each of the compounds or ions given in...Ch. 19 - Name each of the compounds or ions given in...Ch. 19 - Specify whether the following complexes have...Ch. 19 - Predict whether the carbonate ligand CO32- will...Ch. 19 - Draw the geometric, linkage, and ionization...Ch. 19 - Determine the number of unpaired electrons...Ch. 19 - Draw the Crystal field diagrams for [Fe(NO2)6]4-...Ch. 19 - Give the oxidation state of the metal, number of d...Ch. 19 - The solid anhydrous solid CoCl2 is blue in color....Ch. 19 - Is it possible for a complex of a metal in the...Ch. 19 - How many unpaired electrons are present in each of...Ch. 19 - Explain how the diphosphate ion, [O3P-O-PO3]4-,...Ch. 19 - For complexes of the same metal ion with no change...Ch. 19 - Trimethylphosphine, P(CH3)3, can act as a ligand...Ch. 19 - Would you expect the complex [Co(en)3]Cl3 to have...Ch. 19 - Would you expect the Mg3[Cr(CN)5]2 to be...Ch. 19 - Would you expect salts of the gold(I) ion, Au+, to...Ch. 19 - [CuCl4]2- is green. [Cu(H2O)6]2+ is blue. Which...
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