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Gibbs Free Energy

Predicts spontaneity of a reaction.

Formula

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

Variables

\Delta HEnthalpy
TTemperature
\Delta SEntropy

Example

ΔG < 0 → spontaneous

Did You Know?

A negative Gibbs free energy means a reaction is spontaneous — the master rule of chemical direction.

thermodynamicsgibbsspontaneity