Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Question
Multiple Choice 1. This overall reaction is best described as being: a. exothermic b. endothermic c. endergonic d. exergonic e. spontaneous in the forward direction a. -35800 kJ/mol b. 173.4 kJ/mol c. 35800 kJ/mol d. 101.7 kJ/mol e. -274.2 kJ/mol a. +0.46 V b. +0.617 V c. +1.39 V d. -0.46 V e. +1.21 V G a. 147 g Al b. 0.606 g Al c. 4.55 × 10-3 g Al Reactants 2. At 298 K, AH° for the following reaction is -137.5 kJ/mol, and AS° is +120.5 J/K. Calculate the value of AG° for this reaction at 298 K. C2H4 (g) + H2 (g) C2H6 (g) d. 16.4 g Al e. 49.1 g Al X Reactants 2Fe2+ (aq) + Sn4+ (aq) Products 3. Use the Table to calculate the standard cell potential (Eºcell) for the voltaic cell based on the reaction below. Sn2+ (aq) + 2Fe3+, (aq) Reaction progress Products Half-reaction Cr³+ (aq) + 3e- Fe2+ (aq) + 2e- Fe3+ (aq) + e- → Sn4+ (aq) + 2e- → → Cr (s) Fe (s) Fe2+ (s) Sn²+ (aq) 4. How many grams of aluminum metal are produced in the electrolysis of molten AIC13 for 3.25 br with an electrical current of 15.0 A. Al³+ + 3e- Al(s) E° (V) -0,74 -0.440 +0.771 +0.154
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Transcribed Image Text:Multiple Choice 1. This overall reaction is best described as being: a. exothermic b. endothermic c. endergonic d. exergonic e. spontaneous in the forward direction a. -35800 kJ/mol b. 173.4 kJ/mol c. 35800 kJ/mol d. 101.7 kJ/mol e. -274.2 kJ/mol a. +0.46 V b. +0.617 V c. +1.39 V d. -0.46 V e. +1.21 V G a. 147 g Al b. 0.606 g Al c. 4.55 × 10-3 g Al Reactants 2. At 298 K, AH° for the following reaction is -137.5 kJ/mol, and AS° is +120.5 J/K. Calculate the value of AG° for this reaction at 298 K. C2H4 (g) + H2 (g) C2H6 (g) d. 16.4 g Al e. 49.1 g Al X Reactants 2Fe2+ (aq) + Sn4+ (aq) Products 3. Use the Table to calculate the standard cell potential (Eºcell) for the voltaic cell based on the reaction below. Sn2+ (aq) + 2Fe3+, (aq) Reaction progress Products Half-reaction Cr³+ (aq) + 3e- Fe2+ (aq) + 2e- Fe3+ (aq) + e- → Sn4+ (aq) + 2e- → → Cr (s) Fe (s) Fe2+ (s) Sn²+ (aq) 4. How many grams of aluminum metal are produced in the electrolysis of molten AIC13 for 3.25 br with an electrical current of 15.0 A. Al³+ + 3e- Al(s) E° (V) -0,74 -0.440 +0.771 +0.154
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