What this topic covers
Topic 7: Rates of reaction and energy changes has 3 subtopics:
- Exothermic and endothermic reactions
- Rate of reaction
- Chemical cells and fuel cells (chemistry only)
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GCSE Edexcel Higher Chemistry · Topic 7 of 9
Topic 7: Rates of reaction and energy changes – GCSE Edexcel Higher Chemistry revision notes
Choose a subtopic. Learn how reaction rates change, how energy is transferred, and how cells and fuel cells work. 21 lessons in 3 subtopics.
Revise Topic 7: Rates of reaction and energy changes for GCSE Edexcel Higher Chemistry, including Exothermic and endothermic reactions and Rate of reaction.
21
Lessons
3
Subtopics
Topic 7: Rates of reaction and energy changes lessons by subtopic
21 lessons, grouped by subtopic.
Exothermic and endothermic reactions
- Understanding Exothermic and Endothermic Reactions
- Examples and Applications of Energy Transfer Reactions
- Drawing and Understanding Reaction Profiles
- Activation Energy and Collision Theory
- Breaking and Forming Bonds
- Calculating Energy Changes Using Bond Energies
- Explaining Exothermic and Endothermic Reactions
Rate of reaction
- Calculating Mean Rate of Reaction
- Rate Graphs and Tangents
- What affects how fast reactions happen?
- Understanding Collision Theory and Activation Energy
- How Concentration, Pressure and Temperature Affect Reaction Rate
- Surface Area Effects and Using Proportionality in Collision Theory
- What are catalysts and how do they work?
- Identifying catalysts and reaction profiles
- Core practical: measuring rates of reaction: Investigate rates of reaction by collecting gas or following a colour change, then compare how conditions affect the rate.
- Enzymes as catalysts in alcoholic-drink production: Use fermentation to show how enzymes act as biological catalysts in the production of alcoholic drinks.
Chemical cells and fuel cells (chemistry only)
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Frequently asked questions
What is Topic 7: Rates of reaction and energy changes?
Learn how reaction rates change, how energy is transferred, and how cells and fuel cells work. 21 lessons in 3 subtopics.
What is a catalyst?
A catalyst is a substance that increases the rate of a chemical reaction without being used up in the reaction. The What are catalysts and how do they work? notes cover this in full.
What are enzymes?
Enzymes are biological catalysts made of protein that speed up specific reactions in living organisms. The What are catalysts and how do they work? notes cover this in full.
What are examples of endothermic reactions?
Examples of endothermic reactions include thermal decomposition, such as calcium carbonate breaking down into calcium oxide and carbon dioxide, and citric acid reacting with sodium hydrogencarbonate. The Examples and Applications of Energy Transfer Reactions notes cover this in full.
What does an exothermic reaction profile look like?
In an exothermic reaction profile, the products are at a lower energy level than the reactants, because energy is released to the surroundings. The Drawing and Understanding Reaction Profiles notes cover this in full.
What is combustion?
Combustion is the reaction of a fuel with oxygen that releases energy as heat and light. The Examples and Applications of Energy Transfer Reactions notes cover this in full.
What is activation energy?
Activation energy is the minimum amount of energy that particles must have to react when they collide, measured in kJ/mol. The Activation Energy and Collision Theory notes cover this in full.
What are examples of exothermic reactions?
Examples of exothermic reactions include the combustion of fuels such as methane, oxidation reactions such as iron rusting, and neutralisation of acids and bases. The Examples and Applications of Energy Transfer Reactions notes cover this in full.
What does an endothermic reaction profile look like?
In an endothermic reaction profile, the products are at a higher energy level than the reactants, because energy is absorbed from the surroundings. The Drawing and Understanding Reaction Profiles notes cover this in full.