pptx, 10.18 MB
pptx, 10.18 MB

This PowerPoint lesson covers Boiling Points and Intermolecular Forces for Pearson BTEC Applied Science Unit 5 Chemistry, including London dispersion forces, chain length, molecular size and branching. It is designed to help students explain trends in the boiling points of hydrocarbons and structural isomers using intermolecular forces.

An intermolecular force is an attractive force between separate molecules. The lesson distinguishes these attractions from the covalent bonds within molecules and explains that boiling involves overcoming intermolecular forces rather than breaking covalent bonds. Students learn that hydrocarbons are held together by relatively weak London dispersion forces, helping to explain their comparatively low melting and boiling points.

The resource develops the relationship between carbon-chain length and boiling point, showing how larger hydrocarbon molecules contain more electrons and experience stronger London forces. Students apply this trend to both alkanes and alkenes. The lesson then explores the effect of branching, explaining why more highly branched structural isomers are more compact, have less effective surface contact with neighbouring molecules and therefore usually have lower boiling points than less-branched isomers. Examples using pentane, 2-methylbutane and 2,2-dimethylpropane help students apply these ideas to real boiling-point comparisons.

The fully editable PowerPoint (.pptx) includes learning objectives, key terminology, a retrieval starter, structured explanations, worked exam-style answers, data and comparison activities, answer slides and end-of-lesson check-your-understanding questions. Updated in October 2026, it is suitable for classroom teaching, revision, cover work or independent study within Pearson BTEC Applied Science Unit 5 Chemistry.

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Pearson BTEC Applied Science Unit 5 Chemistry A2 Bundle 15 PowerPoints

A2 Structures, reactions and properties of commercially important organic compounds. This Pearson BTEC Applied Science Unit 5 Chemistry A2 bundle contains 15 fully editable PowerPoint lessons covering organic chemistry, mechanisms, reactions, bonding and properties. It provides a complete teaching sequence for the A2 organic chemistry content, progressing from fundamental terminology and molecular representation through to reaction mechanisms, addition polymerisation, hydration and combustion. Organic chemistry is the study of carbon-containing compounds, their structures, properties and reactions. The bundle begins with introductory organic chemistry, IUPAC nomenclature, molecular representations, structural isomerism and E/Z and cis/trans isomerism. Students then develop their understanding of bonding through sigma and pi bonds, hybridisation, molecular shape, bond length and bond strength, including the delocalised bonding found in benzene. Later lessons connect structure to physical properties through boiling points and intermolecular forces before introducing organic reaction mechanisms. Students study homolytic and heterolytic fission, free radicals, electrophiles, carbocations and curly-arrow notation, followed by detailed lessons on free-radical substitution of alkanes and electrophilic addition to alkenes. Carbocation stability is used to explain major and minor products in reactions involving asymmetric alkenes. The final lessons cover addition polymerisation, hydration of ethene, cracking and combustion, allowing students to apply their knowledge to important industrial and chemical processes. This bundle contains 15 fully editable PowerPoint (.pptx) lessons, each designed with learning objectives, key terminology, retrieval starters, structured teaching content, worked examples, student activities, answer slides and check-your-understanding questions. Updated in October 2026, the resources are suitable for classroom teaching, revision, cover work or independent study for Pearson BTEC Applied Science Unit 5 Chemistry – A2.

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