Choose all of the statements from below which correctly describe issues pertaining to the relationship between the emf of a reaction and its Gibbs free energy change. The Gibbs free energy change and emf values of a reaction have opposite algebraic signs (+ vs. -). Faraday's constant must be used in order to interconvert a Gibbs free energy change and a reaction emf. A spontaneous reaction has a negative Gibbs free energy change and a positive emf. A Gibbs free energy change involves moles of substances whereas an emf involves coulombs of electrons. The Gibbs free energy change and emf values of a reaction have the same algebraic signs (+ or -). Calculate the standard Gibbs free energy changes at 25 oC for each of the reactions shown below using the Eo values given. Select whether each of these reactions is nonspontaneous, at equilibrium, or spontaneous under standard conditions. (a) 2 Ag+(aq) + 1 Ba(s) 2 Ag(s) + 1 Ba2+(aq) Eo = 3.699 V Go = kJ/mol nonspontaneousat equilibrium spontaneous (b) 1 Fe3+(aq) + 1 Co2+(aq) 1 Fe2+(aq) + 1 Co3+(aq) Eo = -1.071 V Go = kJ/mol nonspontaneousat equilibrium spontaneous (c) 2 Cr3+(aq) + 6 F-(aq) 2 Cr(s) + 3 F2(g) Eo = -3.610 V Go = kJ/mol nonspontaneousat equilibrium spontaneous (d) 1 I2(s) + 1 Sn(s) 2 I-(aq) + 1 Sn2+(aq) Eo = 0.672 V Go = kJ/mol nonspontaneousat equilibrium spontaneous

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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Choose all of the statements from below which correctly describe issues pertaining to the relationship between the emf of a reaction and its Gibbs free energy change.

The Gibbs free energy change and emf values of a reaction have opposite algebraic signs (+ vs. -).
Faraday's constant must be used in order to interconvert a Gibbs free energy change and a reaction emf.
A spontaneous reaction has a negative Gibbs free energy change and a positive emf.
A Gibbs free energy change involves moles of substances whereas an emf involves coulombs of electrons.
The Gibbs free energy change and emf values of a reaction have the same algebraic signs (+ or -).

Calculate the standard Gibbs free energy changes at 25 ^oC for each of the reactions shown below using the E^o values given. Select whether each of these reactions is nonspontaneous, at equilibrium, or spontaneous under standard conditions.

(a) 2 Ag⁺(aq) + 1 Ba(s) 2 Ag(s) + 1 Ba²⁺(aq)

E^o = 3.699 V

G^o = kJ/mol

nonspontaneousat equilibrium spontaneous

(b) 1 Fe³⁺(aq) + 1 Co²⁺(aq) 1 Fe²⁺(aq) + 1 Co³⁺(aq)

E^o = -1.071 V

G^o = kJ/mol

nonspontaneousat equilibrium spontaneous

E^o = -3.610 V

G^o = kJ/mol

nonspontaneousat equilibrium spontaneous

(d) 1 I₂(s) + 1 Sn(s) 2 I^-(aq) + 1 Sn²⁺(aq)

E^o = 0.672 V

G^o = kJ/mol

nonspontaneousat equilibrium spontaneous

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