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Solved: Impure nickel, refined by smelting sulfide ores in

Chemistry | 8th Edition | ISBN: 9780547125329 | Authors: Steven S. Zumdahl ISBN: 9780547125329 153

Solution for problem 90 Chapter 21

Chemistry | 8th Edition

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Chemistry | 8th Edition | ISBN: 9780547125329 | Authors: Steven S. Zumdahl

Chemistry | 8th Edition

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Problem 90

Impure nickel, refined by smelting sulfide ores in a blast furnace, can be converted into metal from 99.90% to 99.99% purity by the Mond process. The primary reaction involved in the Mond process is a. Without referring to Appendix 4, predict the sign of S for the preceding reaction. Explain. b. The spontaneity of the preceding reaction is temperature dependent. Predict the sign of Ssurr for this reaction. Explain. c. For Ni(CO)4(g), Hf 607 kJ/mol and S 417 J/K mol at 298 K. Using these values and data in Appendix 4, calculate H and S for the preceding reaction. d. Calculate the temperature at which G 0 (K 1) for the preceding reaction, assuming that H and S do not depend on temperature. e. The first step of the Mond process involves equilibrating impure nickel with CO(g) and Ni(CO)4(g) at about 50C. The purpose of this step is to convert as much nickel as possible into the gas phase. Calculate the equilibrium constant for the preceding reaction at 50.C. f. In the second step of the Mond process, the gaseous Ni(CO)4 is isolated and heated at 227C. The purpose of this step is to deposit as much nickel as possible as pure solid (the reverse of the preceding reaction). Calculate the equilibrium constant for the above reaction at 227C. g. Why is temperature increased for the second step of the Mond process? 91. Conside

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CHM103 lass Notes Week 3 9/5­9/9) ________________________________________________________________________________ From revious ections ­ 1.6­1.10 ­ Units and Scientific Notations, Significant Figures and Rounding, Unit Conversions and Estimating Answers ________________________________________________________________________________ Chapter 1: atter and Measurements ­ 1.11 Temperature, eat, and Energy ­ Energy: the capacity to do work or supply heat ­ 1000cal = 1kcal, 1000J = 1KJ, 1cal = 4.184J, 1kcal = 4.184KJ ­ Heat (cal) = Mass (g) x Temp Change (Δ℃) x Spe

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Chapter 21, Problem 90 is Solved
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Textbook: Chemistry
Edition: 8
Author: Steven S. Zumdahl
ISBN: 9780547125329

The full step-by-step solution to problem: 90 from chapter: 21 was answered by , our top Chemistry solution expert on 11/15/17, 04:25PM. This full solution covers the following key subjects: reaction, preceding, mond, process, calculate. This expansive textbook survival guide covers 22 chapters, and 2897 solutions. This textbook survival guide was created for the textbook: Chemistry, edition: 8. Since the solution to 90 from 21 chapter was answered, more than 580 students have viewed the full step-by-step answer. Chemistry was written by and is associated to the ISBN: 9780547125329. The answer to “Impure nickel, refined by smelting sulfide ores in a blast furnace, can be converted into metal from 99.90% to 99.99% purity by the Mond process. The primary reaction involved in the Mond process is a. Without referring to Appendix 4, predict the sign of S for the preceding reaction. Explain. b. The spontaneity of the preceding reaction is temperature dependent. Predict the sign of Ssurr for this reaction. Explain. c. For Ni(CO)4(g), Hf 607 kJ/mol and S 417 J/K mol at 298 K. Using these values and data in Appendix 4, calculate H and S for the preceding reaction. d. Calculate the temperature at which G 0 (K 1) for the preceding reaction, assuming that H and S do not depend on temperature. e. The first step of the Mond process involves equilibrating impure nickel with CO(g) and Ni(CO)4(g) at about 50C. The purpose of this step is to convert as much nickel as possible into the gas phase. Calculate the equilibrium constant for the preceding reaction at 50.C. f. In the second step of the Mond process, the gaseous Ni(CO)4 is isolated and heated at 227C. The purpose of this step is to deposit as much nickel as possible as pure solid (the reverse of the preceding reaction). Calculate the equilibrium constant for the above reaction at 227C. g. Why is temperature increased for the second step of the Mond process? 91. Conside” is broken down into a number of easy to follow steps, and 234 words.

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Solved: Impure nickel, refined by smelting sulfide ores in