# Energy and chemical change notes

> CAPS-aligned study notes for Energy and chemical change in Grade 11 Physical Sciences. Browse the sections below for explanations, worked examples and exam preparation.

- Page: https://www.hlayiso.com/grade-11/physical-sciences/notes/energy-and-chemical-change

Breadcrumbs: [Home](https://www.hlayiso.com/) › [Grade 11](https://www.hlayiso.com/grade-11) › [Physical Sciences](https://www.hlayiso.com/grade-11/physical-sciences) › [Notes](https://www.hlayiso.com/grade-11/physical-sciences/notes) › [Energy and chemical change](https://www.hlayiso.com/grade-11/physical-sciences/notes/energy-and-chemical-change)

## Sections in Energy and chemical change

Each entry shows the free preview (about 200 characters). Create a free Hlayiso account to read the full notes, practise every question and track your progress.

- [Exothermic & Endothermic Reactions](https://www.hlayiso.com/grade-11/physical-sciences/notes/energy-and-chemical-change/exothermic-and-endothermic-reactions) — Exothermic & Endothermic Reactions Every chemical reaction involves an energy change. When you burn fuel, light a match, or dissolve ammonium chloride in water, energy is either released to or…
- [Activation Energy & Energy Diagrams](https://www.hlayiso.com/grade-11/physical-sciences/notes/energy-and-chemical-change/activation-energy-and-energy-diagrams) — Activation Energy & Energy Diagrams Not all collisions between reactant molecules lead to a reaction. For a reaction to occur, the colliding molecules must have enough energy to break the existing…

## Other Physical Sciences topics

- [Vectors in two dimensions](https://www.hlayiso.com/grade-11/physical-sciences/notes/vectors-in-two-dimensions)
- [Newton’s laws](https://www.hlayiso.com/grade-11/physical-sciences/notes/newtons-laws)
- [Electrostatics](https://www.hlayiso.com/grade-11/physical-sciences/notes/electrostatics)
- [Electromagnetism](https://www.hlayiso.com/grade-11/physical-sciences/notes/electromagnetism)
- [Electric circuits](https://www.hlayiso.com/grade-11/physical-sciences/notes/electric-circuits)
- [Atomic combinations](https://www.hlayiso.com/grade-11/physical-sciences/notes/atomic-combinations)
- [Intermolecular forces](https://www.hlayiso.com/grade-11/physical-sciences/notes/intermolecular-forces)
- [Ideal gases and thermal properties](https://www.hlayiso.com/grade-11/physical-sciences/notes/ideal-gases-and-thermal-properties)
- [Quantitative aspects of chemical change](https://www.hlayiso.com/grade-11/physical-sciences/notes/quantitative-aspects-of-chemical-change)
- [Types of reaction](https://www.hlayiso.com/grade-11/physical-sciences/notes/types-of-reaction)

## Frequently asked questions

### What is covered in Energy and chemical change for Grade 11 Physical Sciences?

The Energy and chemical change section covers all key concepts from the Grade 11 Physical Sciences CAPS curriculum, including detailed explanations, worked examples, and exam preparation tips.

### Are the Energy and chemical change notes free?

Yes. Each section has a free preview, and a free Hlayiso account lets you read the full notes.

### How do these notes help with exam preparation?

Our Energy and chemical change notes are CAPS-aligned and include worked examples, common mistakes to avoid, and exam tips — everything you need to prepare for your Grade 11 Physical Sciences exams.

### Are there quizzes for Energy and chemical change?

Yes. Hlayiso has quizzes for Energy and chemical change in Grade 11 Physical Sciences. Test your understanding after reading the notes.

---

Hlayiso: free CAPS and IEB past papers, memos, notes and study guides for South African learners. When citing, link the page URL above, not a PDF or /api/ URL.