Spontaneous Reactions and Gibbs Free Energy

Edexcel A-level ChemistryEntropyLesson 6 of 6

Changes are thermodynamically feasible if the total entropy change is positive, so for an endothermic reaction, if an increase in entropy is more significant than the endothermic nature of the reaction will be spontaneous. For example when pure ethanoic acid is added to solid ammonium carbonate a violent reaction takes place.

2CH₃COONH₄(s) + H₂O (l) + CO₂(g)

More in Entropy

• Entropy
• The Second Law of Thermodynamics
• The Entropy Change of a System
• The Effect of Temperature on Entropy
• The Entropy Change of the Surroundings

All 6 lessons in Entropy · All Edexcel A-level Chemistry topics