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Topic plan · A-Level Chemistry 9701 · Topic 5

Chemical energetics

Enthalpy changes, how they are measured, and Hess's Law as the tool for the ones that cannot be measured directly.

Open the topic lab Question bank Notes PDF
Unit at a glance

4 lessons, 180 minutes of teaching

Lessons
4, each planned for 45 minutes
Worksheets
4 with answer keys
Quiz questions
32 multiple-choice, assignable in the app
Lab
Chemical energetics lab
Scheme of work

The lessons in order

RefLesson packStructureWorksheetQuizLab tab
5.1Enthalpy changes and definitions
Every reaction either releases energy to the surroundings or takes it in.
Quiz-Quiz-Trade6 Q, 13 marks8 MCQtab 1, tab 5
5.1Calorimetry
Nobody can measure an enthalpy change directly, but anyone can read a thermometer.
Round Table6 Q, 16 marks8 MCQtab 2
5.1Bond energies
Every reaction is bonds breaking and new bonds forming.
Rally Coach6 Q, 13 marks8 MCQtab 3
5.2Hess's law
Some enthalpy changes cannot be measured: you cannot make methane by mixing carbon and hydrogen in a calorimeter.
Numbered Heads Together6 Q, 13 marks8 MCQtab 4

Each pack holds the plan, worksheet and quiz for its lesson. Teach the rows in order; the lab tabs match the student lessons.

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