Unit at a glance
4 lessons, 180 minutes of teaching
Scheme of work
The lessons in order
| Ref | Lesson pack | Structure | Worksheet | Quiz | Lab tab |
|---|---|---|---|---|---|
| 23.1 | Lattice energy and Born-Haber cycles Lattice energy cannot be measured directly, but a Born-Haber cycle finds it from steps you can measure: atomising the elements, ionising the metal, adding electrons to the non-metal, and the enthalpy change of formation. | Corners | 6 Q, 16 marks | 8 MCQ | tab 2, tab 1, tab 3 |
| 23.2 | Enthalpies of solution and hydration Dissolving an ionic solid is a contest: the lattice energy holds the ions together, the hydration of each ion releases energy as water molecules cluster round it. | Round Table | 6 Q, 15 marks | 8 MCQ | tab 4 |
| 23.3 | Entropy change Entropy measures how many ways the particles and their energy can be arranged. | Rally Coach | 6 Q, 14 marks | 8 MCQ | tab 5 |
| 23.4 | Gibbs free energy change Enthalpy alone cannot say whether a reaction is feasible: some endothermic reactions happen on their own. | Numbered Heads Together | 6 Q, 16 marks | 8 MCQ | tab 6 |
Each pack holds the plan, worksheet and quiz for its lesson. Teach the rows in order; the lab tabs match the student lessons.
Also for this topic
Topic resources
Topic labChemical energetics (A Level) lab
Question bank32 questions across the topic
Revision notesOne page per lesson
Notes PDFPrintable topic notes
Student syllabus pageChemical energetics
Practical trainerTitration trainer
Practical trainerQualitative analysis
Practical trainerRates and energetics graphs
Practical trainerPaper 3 workout: dilution and titration
Practical trainerPaper 3 workout: enthalpy change
Practical trainerPaper 3 workout: a hydrated salt