Cambridge AS & A Level Chemistry
23.3Entropy change, ΔS
Entropy change, ΔS in Cambridge AS & A Level Chemistry: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic23 practice questions1 lesson
Learning objectives
What the syllabus expects you to be able to do.
- 23.3.1Define entropy in terms of the number of possible arrangements of particles and their energy.
- 23.3.2Predict and explain the sign of ΔS for changes of state, temperature changes and reactions that change the number of gas molecules.
- 23.3.3Calculate ΔS⦵ for a reaction from standard entropies.
Lessons
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Entropy and Gibbs free energy
45 min
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Sample question
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