This site uses cookie tracking technologies. Learn more in our Cookie Policy.

IB Chemistry R1.4 Entropy and Spontaneity Lessons

Report an issue

Written by official IB examiners

This lesson delivers structured, step-by-step lessons that guide students through every part of the IB Chemistry syllabus for R1.4 Entropy and spontaneity (HL). These lessons simplify complex ideas like chemical kinetics, thermodynamics, and equilibrium systems, while worked examples show how to approach IB-style questions.

Designed for both HL and SL learners, RevisionDojo lessons ensure students not only understand the theory but also know how to apply it in IB Paper exam situations.

With clear explanations, active learning checks, and a syllabus-first design, RevisionDojo makes revision less overwhelming and more effective.

R1.4.1 Entropy (S) (HL only)

R1.4.2 Gibbs free energy (ΔG) (HL only)

R1.4.3 Spontaneity and Gibbs free energy (HL only)

R1.4.4 Gibbs free energy and equilibrium (HL only)

IB Chemistry R1.4 Entropy and Spontaneity Lessons

Structure 1. Models of the particulate nature of matter5 subtopics

Structure 2. Models of bonding and structure4 subtopics

Structure 3. Classification of matter2 subtopics

Reactivity 1. What drives chemical reactions?4 subtopics

Reactivity 2. How much, how fast and how far?3 subtopics

Reactivity 3. What are the mechanisms of chemical change?4 subtopics

IB Chemistry R1.4 Entropy and Spontaneity Lessons

Structure 1. Models of the particulate nature of matter5 subtopics

Structure 2. Models of bonding and structure4 subtopics

Structure 3. Classification of matter2 subtopics

Reactivity 1. What drives chemical reactions?4 subtopics

Reactivity 2. How much, how fast and how far?3 subtopics

Reactivity 3. What are the mechanisms of chemical change?4 subtopics

Lessons for R1.4 Entropy and spontaneity (HL) - IB