6.2 Entropy, Gibbs Free Energy, and the Equilibrium Constant

Course Menu
Chad's Organic Chemistry Master Course

Quizzes, Study Guides, Chapter Tests, Final Exam Reviews, Practice Final Exams, and More!

Table of Contents
    Add a header to begin generating the table of contents

    Entropy (S)

    -related to the amount of ‘disorder’ in a system

    -related to the number of states (microstates) in which a system can exist

    2nd Law of Thermodynamics: For a spontaneous process, ΔSuniverse > 0.

    factors affecting entropy

    Gibbs Free Energy (G)

    -Energy available to do work

    MEANING OF ΔG VALUES
    ΔG
    - Spontaneous Exergonic
    + Nonspontaneous Endergonic

    ΔG = ΔH - TΔS

    ΔHo ΔSo -TΔSo
    - + - Spontaneous at all temperatures
    + - + Nonspontaneous at all temperatures
    - - + Spontaneous at low temperatures
    + + - Spontaneous at high temperatures

    ΔGo = -RTlnKeq

    ΔGo and Keq
    ΔGo < 0 Keq > 1
    ΔGo > 0 Keq < 1