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At what temperature is the reduction of tungsten(VI) oxide by hydrogen to give metallic tungsten and steam spontaneous?

At what temperature is the reduction of tungsten(VI) oxide by hydrogen to give metallic tungsten and steam spontaneous?

Chemistry
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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### Determining the Temperature for Spontaneous Reduction of Tungsten(VI) Oxide by Hydrogen #### Question At what temperature is the reduction of tungsten(VI) oxide by hydrogen to give metallic tungsten and steam spontaneous? #### Details 1. **Substance Information**: - WO₃(s): Tungsten(VI) oxide, solid - W(s): Tungsten, solid - H₂(g): Hydrogen, gas - H₂O(g): Water, gas (steam) 2. **Thermodynamic Data**: | Substance | ΔH<sub>f</sub>º (kJ/mol) | S<sub>f</sub>º (J/(K·mol)) | |-----------|-------------------------|---------------------------| | WO₃(s) | -843 | 76.0 | | W(s) | 0.0 | 32.6 | | H₂(g) | 0.0 | 130.6 | | H₂O(g) | -241.8 | 188.8 | For further assistance, you can refer to the **Periodic Table** or **See Hint** to guide through the calculations and conceptual understanding. This question assesses the understanding of Gibbs free energy and its relationship with temperature, focusing on how a chemical reaction's spontaneity can be influenced by thermodynamic properties such as enthalpy and entropy.
Transcribed Image Text:### Determining the Temperature for Spontaneous Reduction of Tungsten(VI) Oxide by Hydrogen #### Question At what temperature is the reduction of tungsten(VI) oxide by hydrogen to give metallic tungsten and steam spontaneous? #### Details 1. **Substance Information**: - WO₃(s): Tungsten(VI) oxide, solid - W(s): Tungsten, solid - H₂(g): Hydrogen, gas - H₂O(g): Water, gas (steam) 2. **Thermodynamic Data**: | Substance | ΔH<sub>f</sub>º (kJ/mol) | S<sub>f</sub>º (J/(K·mol)) | |-----------|-------------------------|---------------------------| | WO₃(s) | -843 | 76.0 | | W(s) | 0.0 | 32.6 | | H₂(g) | 0.0 | 130.6 | | H₂O(g) | -241.8 | 188.8 | For further assistance, you can refer to the **Periodic Table** or **See Hint** to guide through the calculations and conceptual understanding. This question assesses the understanding of Gibbs free energy and its relationship with temperature, focusing on how a chemical reaction's spontaneity can be influenced by thermodynamic properties such as enthalpy and entropy.
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