ApproachThe nonstandard potential for a cell can be related to the standard cell potential using the Nernst equation:Ecell = EcellRTnFx In QWhere R = 8.314 J K¹ mol-¹ and F = 96.485 J V-¹ mol-¹At 298 K, this RT/F combine to give,0.0257 VEcell = Ecellx In QnWhen one of the reactants or products is a gas, its pressure is used to calculate the reaction quotient, Q. Concentrations are used inmoles per liter. Pressures of gas-phase species are used in units of bars.Step 1. Write the anode and cathode half-reactions and determine n.Step 2. Calculate Eºcell.Step 3. Calcuate Q.Step 4. Calculate Ecell under these nonstandard conditions. What is the calculated value of the cell potential at 298 K for an electrochemical cell with the following reaction, when the H₂ pressure is2.04×10-3 bar, the H+ concentration is 1.43 M, and the Al³+ concentration is 6.14x10-4 M ?6H+ (aq) + 2Al(s)—3H₂(g) + 2Al³+ (aq)Answer:VThe cell reaction as written above is product-favored (spontaneous) for the concentrations given:SubmitShow Approach Hide Tutor Steps

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What is the calculated value of the cell potential at 298 K for an electrochemical cell with the following reaction, when the H₂ pressure is 2.04x10-3 bar, the H+ concentration is 1.43 M, and the Al³+ concentration is 6.14x10-4 M ? 6H+ (aq) + 2Al(s)—3H₂(g) + 2Al³+ (aq) Answer: v The cell reaction as written above is product-favored (spontaneous) for the concentrations given: Submit Show Approach Hide Tutor Steps

What is the calculated value of the cell potential at 298 K for an electrochemical cell with the following reaction, when the H₂ pressure is 2.04x10-3 bar, the H+ concentration is 1.43 M, and the Al³+ concentration is 6.14x10-4 M ? 6H+ (aq) + 2Al(s)—3H₂(g) + 2Al³+ (aq) Answer: v The cell reaction as written above is product-favored (spontaneous) for the concentrations given: Submit Show Approach Hide Tutor Steps

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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