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# Year 11 Chemistry

## Module 4 | Drivers of reactions

### Content 3: Entropy and Gibbs free energy

#### Lesson 1 | Entropy

• analyse the differences between entropy and enthalpy

• use modelling to illustrate entropy changes in reactions

• predict entropy changes from balanced chemical reactions to classify as increasing or decreasing entropy

#### Lesson 2 | Gibbs free energy

• explain reaction spontaneity using terminology, including: (ACSCH072)
– Gibbs free energy
– enthalpy
– entropy

• solve problems using $\Delta Go\; = \; \Delta Ho\; -\; T\Delta So$ (Gibbs free energy formula) to classify reactions as spontaneous or non-spontaneous

• predict the effect of temperature changes on spontaneity (ACSCH070)