HL Only

Entropy & Spontaneity

Why do reactions happen? The balance between Enthalpy (Heat) and Entropy (Disorder) determines the fate of the universe.

Guiding Question: What factors allow us to predict whether a reaction will occur spontaneously?

The measure of disorder. Why gases are messier than solids.

The master equation: $\Delta G = \Delta H - T\Delta S$ .

Predicting if a reaction is feasible at a given temperature.

The link between Thermodynamics ( $\Delta G$ ) and Equilibrium ( $K_c$ ).

Definitions and Spontaneity conditions.

Calculating $\Delta G$ and Temperature limits.