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Gold has a melting point Of 1338 K with AH°fus = 12.7 kJ/mol and boils at 3080 K with AH°vap = 310 kJ/mol. Given the specific-heat capacities (in J/g K) of Au(s), Au(I), and Au(g) are 0.131, 0.149, and 0.0632, respectively, how much heat (J) is requires to convert 2.15 Au(s) at 1000 K to liquid at 1500K? 160. J 12.8 J 81.1 J O285 J Question 25 Which is the oxidizing agent in the reaction below? Cr₂O7²- + 6 S₂03² + 14 H*→ 2 Cr³+ + 3 S406² +7 H₂O O Cr₂O7²- 2ܘܘ MacBook Pro

Gold has a melting point Of 1338 K with AH°fus = 12.7 kJ/mol and boils at 3080 K with AH°vap = 310 kJ/mol. Given the specific-heat capacities (in J/g K) of Au(s), Au(I), and Au(g) are 0.131, 0.149, and 0.0632, respectively, how much heat (J) is requires to convert 2.15 Au(s) at 1000 K to liquid at 1500K? 160. J 12.8 J 81.1 J O285 J Question 25 Which is the oxidizing agent in the reaction below? Cr₂O7²- + 6 S₂03² + 14 H*→ 2 Cr³+ + 3 S406² +7 H₂O O Cr₂O7²- 2ܘܘ MacBook Pro

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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### Chemistry Questions #### Thermodynamics of Gold Gold has a melting point of 1338 K with ΔH°_fus_ = 12.7 kJ/mol and boils at 3080 K with ΔH°_vap_ = 310 kJ/mol. Given the specific heat capacities (in J/g∙K) of Au(s), Au(l), and Au(g) are 0.131, 0.149, and 0.0632, respectively, how much heat (J) is required to convert 2.15 g of Au(s) at 1000 K to liquid at 1500 K? - ○ 160. J - ○ 12.8 J - ○ 81.1 J - ○ 285 J --- #### Question 25: Oxidizing Agent Identification Which is the oxidizing agent in the reaction below? \[ \text{Cr}_2\text{O}_7^{2-} + 6 \text{S}_2\text{O}_3^{2-} + 14 \text{H}^+ \longrightarrow 2 \text{Cr}^{3+} + 3 \text{S}_4\text{O}_6^{2-} + 7 \text{H}_2\text{O} \] - ○ Cr₂O₇²⁻ - ○ Cr³⁺ - ○ S₂O₃²⁻ --- This set of questions covers the basics of thermodynamics and redox reactions in chemistry, assessing understanding of phase changes, specific heat capacities and identification of oxidizing agents in a chemical equation.
Transcribed Image Text:### Chemistry Questions #### Thermodynamics of Gold Gold has a melting point of 1338 K with ΔH°_fus_ = 12.7 kJ/mol and boils at 3080 K with ΔH°_vap_ = 310 kJ/mol. Given the specific heat capacities (in J/g∙K) of Au(s), Au(l), and Au(g) are 0.131, 0.149, and 0.0632, respectively, how much heat (J) is required to convert 2.15 g of Au(s) at 1000 K to liquid at 1500 K? - ○ 160. J - ○ 12.8 J - ○ 81.1 J - ○ 285 J --- #### Question 25: Oxidizing Agent Identification Which is the oxidizing agent in the reaction below? \[ \text{Cr}_2\text{O}_7^{2-} + 6 \text{S}_2\text{O}_3^{2-} + 14 \text{H}^+ \longrightarrow 2 \text{Cr}^{3+} + 3 \text{S}_4\text{O}_6^{2-} + 7 \text{H}_2\text{O} \] - ○ Cr₂O₇²⁻ - ○ Cr³⁺ - ○ S₂O₃²⁻ --- This set of questions covers the basics of thermodynamics and redox reactions in chemistry, assessing understanding of phase changes, specific heat capacities and identification of oxidizing agents in a chemical equation.
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