Entropy and Gibbs Free Energy (HSC SSCE Chemistry): Flashcards

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Gibbs Free Energy
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What Gibbs free energy combines

Enthalpy and entropy

Gibbs free energy equation

ΔG°=ΔH°TΔS°\Delta G° = \Delta H° - T\Delta S°

Negative ΔG°\Delta G° means

Reaction proceeds forward

Positive ΔG°\Delta G° means

Reaction proceeds in reverse

Standard pressure for gases (kPa)

100.0 kPa

Standard conc. for solutions

1.00 mol L1^{-1}

To convert ΔS°\Delta S° J to kJ, multiply by

10310^{-3}

Type 1 reaction

Spontaneous at room temp., occurs immediately

Type 2 reaction

Needs initial activation (spark/match/heat)

Type 3 reaction

Requires continuous heating

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