Chapter 17 Lecture 3

# Chapter 17 Lecture 3 - Chapter 17 Lecture 3 What does G...

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Chapter 17 Lecture 3 What does ΔG mean? It is a calculation that tells you about the possibilities. How much free energy change could potentially take place if the reactants are mixed. Since energy is in both heat and arrangement you have to pick a starting place: ΔG o Consider the generic reaction: aA + bB cC + dD You can calculate the ΔG o for this reaction But what if the concentrations are not molar? Answer: Add adjustment term: ΔG = ΔG o + RT lnQ Where: b a d c B A D C Q ] [ ] [ ] [ ] [ = So in this case:

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If ΔG > 0, No reaction If ΔG < 0, reactions happens, Q changes so that: [A] = [A] eq [B] = [B] eq [C] = [C] eq [D] = [D] eq b eq a eq d eq

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Chapter 17 Lecture 3 - Chapter 17 Lecture 3 What does G...

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