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R1.3 Combustion Reactions (IBDP Chemistry)

R1.3 Combustion Reactions (IBDP Chemistry)

Subject: Chemistry

Age range: 16+

Resource type: Lesson (complete)

Last updated

15 May 2026

pptx, 7.51 MB
pptx, 7.51 MB

This PowerPoint lesson explains combustion reactions and their enthalpy changes, guiding IBDP Chemistry students through balancing equations and understanding exothermic energy profiles. Designed for first assessment 2025, it develops the skills required to deduce and explain combustion reactions of metals, non-metals, hydrocarbons and alcohols.

Combustion is defined as a chemical reaction between a fuel and oxygen gas that releases energy, usually producing oxides. In complete combustion of organic compounds, carbon is oxidised to carbon dioxide and hydrogen is oxidised to water. This lesson clearly defines key terms including fuel, exothermic reaction, hydrocarbon, rusting, and tarnishing, and links them to real chemical processes.

Students explore combustion of metals (e.g. magnesium forming magnesium oxide), slow oxidation processes such as rusting and tarnishing, and combustion of non-metals such as phosphorus. Organic combustion is developed in detail, with worked examples for methane and ethanol, showing how to balance equations and identify complete oxidation products. Emphasis is placed on recognising patterns so students can confidently deduce combustion equations for unfamiliar hydrocarbons and alcohols.

Energy profile diagrams are used to explain why combustion reactions have negative ΔH values. The lesson reinforces that enthalpy is a state function and links combustion to Hess’s law principles.

Environmental and safety contexts are included, such as biofuels, ethanol blending and flammability hazards.

Starter activities, structured explanations, mini-whiteboard tasks and practice questions are included.

File type included: PowerPoint (.pptx)
Last updated: January 2026 – equation examples refined and sustainability links expanded in line with the 2025 IB Chemistry syllabus.

Get this resource as part of a bundle and save up to 33%

A bundle is a package of resources grouped together to teach a particular topic, or a series of lessons, in one place.

Bundle

BUNDLE R1 What Drives Chemical Reactions? SL & HL (IBDP Chemistry)

This bundle of PowerPoints covers IBDP Chemistry R1: What drives chemical reactions? for first examination 2025, including both SL and HL content across energy transfer, enthalpy changes, fuels, entropy and Gibbs energy. It is designed to give teachers and students a complete, well-sequenced set of lessons for teaching the full R1 topic from core foundations through to Higher Level thermodynamics. In IBDP Chemistry, this topic explores the energetic and thermodynamic ideas that explain why reactions happen and whether they are feasible. Students begin with the basics of energy transfer in chemical reactions, including conservation of energy, system and surroundings, exothermic and endothermic processes, and calorimetry. They then move into bond breaking and forming, Hess’s law, and HL extensions such as standard enthalpy changes of combustion and formation and Born–Haber cycles. The topic also connects chemistry to real-world energy use through lessons on combustion reactions, incomplete combustion, fossil fuels, biofuels and fuel cells. The bundle also includes the full HL R1.4 section on entropy and spontaneity, helping students understand how disorder, enthalpy and temperature combine to determine whether a process is spontaneous. These lessons cover entropy, Gibbs energy and spontaneous changes, and Gibbs energy and equilibrium, making the resource especially useful for deeper HL teaching and revision. This fully editable bundle includes 15 PowerPoint (.pptx) lessons with retrieval starters, key word definitions, clear explanations, worked examples, calculation practice and questions with answers. It is ideal for first teaching, revision, cover lessons or building a full unit sequence aligned to the IBDP Chemistry specification for first examination 2025. File types included: editable PowerPoint (.pptx) files. Last updated: 2026 – improved sequencing, refined explanations, and enhanced practice tasks across SL and HL energetics and thermodynamics content.

£20.00
Bundle

BUNDLE R1 What Drives Chemical Reactions? SL Content Only (IBDP Chemistry)

This bundle of PowerPoints covers the SL content of R1: What drives chemical reactions? for IBDP Chemistry (first examination 2025), bringing together energy transfer, enthalpy changes, bond enthalpies, Hess’s law and fuels in one carefully structured resource. It is designed to help students understand why chemical reactions happen, how energy changes can be measured, and how these ideas connect to real-world fuel use and sustainability. In IBDP Chemistry, this topic explores the energetic factors that drive reactions forward. Students begin by learning about energy transfer in chemical reactions, including the law of conservation of energy, system and surroundings, and the difference between heat and temperature. They then move on to exothermic and endothermic reactions, calorimetry and enthalpy change calculations, before developing their understanding of bond breaking and bond forming and using Hess’s law to determine enthalpy changes indirectly. The topic finishes with the chemistry of fuels, including combustion reactions, incomplete combustion, fossil fuels, biofuels and fuel cells, helping students connect core energetics ideas to industrial, environmental and sustainability contexts. This fully editable bundle includes 10 PowerPoint (.pptx) lessons: R1.1 Energy Transfer in Chemical Reactions, Exothermic and Endothermic Reactions, and Enthalpy and Heat Transfers. R1.2 Bond Breaking and Forming (SL) and Hess’s Law (SL). R1.3 Combustion Reactions, Incomplete Combustion of Organic Compounds, Fossil Fuels, Biofuels, and Fuel Cells. Across the bundle, students are supported with retrieval starters, key word definitions, clear explanations, worked examples, calculation practice and questions with answers. These lessons are ideal for first teaching, revision, cover work or building a full SL energetics sequence aligned to the IBDP Chemistry specification for first examination 2025. File types included: editable PowerPoint (.pptx) files. Last updated: 2026 – improved lesson sequencing, refined explanations and enhanced practice tasks across energetics, bond enthalpy and fuels content.

£13.50
Bundle

BUNDLE R1.3 Energy from Fuels (IBDP Chemistry)

This comprehensive lesson bundle covers R1.3 Energy from Fuels for IBDP Chemistry (first examination 2025), including combustion, fossil fuels, biofuels and fuel cells. It provides a clear, structured sequence of lessons to help students understand how chemical energy is released, transferred and evaluated in real-world contexts. Energy from fuels focuses on how substances react with oxygen to release energy and how different fuels can be compared in terms of efficiency, sustainability and environmental impact. Combustion is a highly exothermic reaction where fuels react with oxygen to form more stable products such as carbon dioxide and water, releasing significant amounts of energy . This bundle supports students in understanding both the chemistry and the global implications of energy use. This resource includes 5 fully editable PowerPoint (.pptx) lessons designed for classroom teaching, revision or flipped learning: • Combustion reactions, including hydrocarbons, alcohols and metals • Complete vs incomplete combustion, with equations and real-world hazards such as carbon monoxide • Fossil fuels, including energy content, CO₂ emissions and the greenhouse effect • Biofuels, including photosynthesis, sustainability and carbon neutrality • Fuel cells, including hydrogen and methanol systems with half-equations and energy efficiency Each lesson includes retrieval starters, key definitions, worked examples, application questions and exam-style practice tasks. Students are guided through balancing combustion equations, comparing fuels quantitatively, and linking chemistry to global challenges such as climate change and energy security. Ideal for IB teachers, this bundle is fully aligned to the latest specification and supports both conceptual understanding and exam performance. Files included: • 5 × editable PowerPoint (.pptx) lessons Last updated: 2026 – refined explanations, improved exam-style questions, and enhanced links to real-world applications including sustainability and climate change.

£6.70

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