IB Chemistry R1.4 Entropy (HL)
R1.4 HL

Entropy & Spontaneity

Predicting whether reactions happen - entropy, Gibbs free energy, and the Second Law.

R1.4.1 Entropy (S)

Disorder, microstates, and predicting ΔS.

R1.4.2 Gibbs Free Energy (ΔG)

ΔG = ΔH − TΔS and spontaneity.

R1.4.3 Spontaneity & Temperature

Four-quadrant matrix and transition temperatures.

R1.4.4 Gibbs & Equilibrium

Reaction quotient Q, calculating K from ΔG°.

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