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Tackling Thermodynamics Problems

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Updated:  
2016-03-26 17:38:23
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From The Book:  
Chemistry All-in-One For Dummies (+ Chapter Quizzes Online)
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The Gibbs Free Energy is the best indicator about whether a reaction will be spontaneous or nonspontaneous. You'll need to know this as you study Chemistry II. It has the form:

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In this equation ΔG° is the Gibbs Free Energy of a reaction under standard conditions of 1 atm (or 1 bar) for gases and 1 M for solutions at 25°C; ΔH° is the enthalpy of the reaction under standard conditions; T is the Kelvin temperature; and ΔS° is the entropy of the reaction under standard conditions.

A spontaneous process has °G 0. When °G = 0, the process is at equilibrium.

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About the book author:

John T. Moore, EdD, is a chemistry professor at Stephen F. Austin State University. He’s the author of many chemistry titles, including all editions of Chemistry For Dummies.