L9 Intermolecular Forces (Unit 1 Chemistry BTEC Applied Science)

This editable 60-slide PowerPoint covers intermolecular forces, electronegativity, molecular polarity and boiling-point trends for Pearson BTEC Applied Science Unit 1 Chemistry. Designed to develop students’ understanding of molecular interactions and physical properties, the lesson provides clear explanations, diagrams, worked examples and opportunities for independent practice.

The resource introduces intermolecular forces as attractions between separate molecules, distinguishing them from the strong covalent bonds within molecules. Students explore electronegativity and how differences in electron attraction produce polar covalent bonds, partial charges and permanent dipoles. The relationship between molecular shape, bond polarity and overall molecular polarity is explained using examples including methane, carbon dioxide, water and ammonia.

The lesson then explores the three main types of intermolecular forces: London dispersion forces, permanent dipole–dipole attractions and hydrogen bonding. Students learn how temporary and induced dipoles form, how molecular size, electron number and surface area influence London forces, and why hydrogen bonding occurs in molecules containing N–H, O–H or H–F bonds.

Further topics include comparing the relative strengths of intermolecular forces and explaining differences in melting and boiling points. Worked examples demonstrate how molecular structure and intermolecular attractions influence boiling-point trends, including comparisons between polar and non-polar substances.

The PowerPoint includes a five-question starter with answers, clearly defined learning objectives, key scientific vocabulary, detailed diagrams, guided activities, mini-whiteboard assessment questions and ten check-your-understanding questions with answers for self-assessment.

Ideal for classroom teaching, independent learning and revision, this resource supports students studying Pearson BTEC Level 3 Applied Science Unit 1 Chemistry.

File format: Editable PowerPoint (.pptx), 60 slides.

Resource date: October 2026.