   # Consider the equation Δ G° = -nF . What are the four terms in this equation? Why does a minus sign appear in the equation? What does the superscript o indicate? ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243

#### Solutions

Chapter
Section ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 17, Problem 4RQ
Textbook Problem
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## Consider the equation ΔG° = -nF . What are the four terms in this equation? Why does a minus sign appear in the equation? What does the superscript o indicate?

Interpretation Introduction

Interpretation:

The equation for standard free energy change ΔG°=nFE° is given. The significance of all the four terms, minus sign and the superscript ° is to be stated.

Concept introduction:

The free energy change reflects the work involved in moving an electron. The given equation ΔG°=nFE° , shows that the potential of the cell is related to the change in free energy for the reactants and products that are involved in the cell reaction.

To explain: The significance of all the four terms used in the equation ΔG°=nFE° ; the reason of minus sign that appears in the given equation; the significance of superscript ° in the given equation.

### Explanation of Solution

The four terms used in the given equation ΔG°=nFE° are ΔG° , n , F , E° .

The significance of the four terms used in the equation is defined as,

• ΔG° is the free energy available for moving an electron.
• n is the number of electrons involved in a balanced chemical reaction.
• F is the Faraday’s constant (96,485C/mol) .
• E° is the cell potential in the standard state

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