Example 2.2(a) What is the maximum electrical work obtainable from the reaction| 02(g) + H,(g)H2O(1)%3Dunder standard conditions (25°C and 1 atm pressure and specifiedamounts of reactants)?(b) What is the heat transferred if this maximum work is obtained?The standard free energy change for the reaction, AG°, is -237.18 kJ mol.The standard enthalpy change, AH°, is -285.85 kJ mol.(a) According to equation 30, the maximum electrical work available underreversible conditions (i.e., when T A,S = 0) is w' = -.kJ mol'. (Two electrons are transferred per mole of the reaction. There-fore the standard potential difference for the electrochemical reactionis: -(-237,180) J/2 x 96,485 J/V =AG° = 237.181.23 V.)- 285.85 + 237.18(b) The heat transferred is-48.67 kJ mol-1. The system releases heat to the surroundings, butmuch less than under irreversible conditions for this reaction.AH° + w' =(Note that here the system is the electrochemical reaction plus the externalelectric circuit required to reversibly extract the free energy released.)

In a reversible reaction, very less amount of heat is lost and thus such reactions are highly…

(a) What is the maximum electrical work obtainable from the reaction | 0,(g) + H,(g) = H,O(1) %3D under standard conditions (25°C and 1 atm pressure and specified amounts of reactants)? (b) What is the heat transferred if this maximum work is obtained? The standard free energy change for the reaction, AG°, is -237.18 kJ mol-'. The standard enthalpy change, AH°, is -285.85 kJ mol.

(a) What is the maximum electrical work obtainable from the reaction | 0,(g) + H,(g) = H,O(1) %3D under standard conditions (25°C and 1 atm pressure and specified amounts of reactants)? (b) What is the heat transferred if this maximum work is obtained? The standard free energy change for the reaction, AG°, is -237.18 kJ mol-'. The standard enthalpy change, AH°, is -285.85 kJ mol.

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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