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v0.1.1455
NotesChemistry HLTopic 4.4
Unit 4 · Reactivity 1: What drives chemical reactions? · Topic 4.4

IB Chemistry HL — Entropy and spontaneity

Topic 4.4 of IB Chemistry covers Entropy and spontaneity, which is part of Unit 4: Reactivity 1: What drives chemical reactions?. Students explore key concepts including Entropy and ΔS (HL), Gibbs energy and spontaneity (HL). A strong understanding of entropy and spontaneity is essential for IB Chemistry HL exams and builds the foundation for connected topics across the syllabus.

Exam technique guidePractice questions

What you'll learn in Topic 4.4

  • 4.4.1 Entropy and ΔS (HL)
  • 4.4.2 Gibbs energy and spontaneity (HL)
Suggested study order: Read the notes for each sub-topic below → test yourself with flashcards → attempt practice questions → review exam technique.

Study resources — 4.4 Entropy and spontaneity

4.4.1

Entropy and ΔS (HL)

Notes
4.4.2

Gibbs energy and spontaneity (HL)

Notes

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Topic 4.4 Entropy and spontaneity forms a core part of Unit 4: Reactivity 1: What drives chemical reactions? in IB Chemistry HL. Mastering these concepts will strengthen your understanding of connected topics across the syllabus and prepare you for exam questions that require analysis, evaluation, and real-world application.

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