| Lesson Plan |
| Grade: |
Date: 25/02/2026 |
| Subject: Chemistry |
| Lesson Topic: Explain changes of state in terms of kinetic particle theory, including the interpretation of heating and cooling curves |
Learning Objective/s:
- Describe particle arrangement and motion in solids, liquids, and gases.
- Explain how changes in kinetic energy relate to temperature and phase changes.
- Interpret heating and cooling curves, identifying slopes and plateaus.
- Calculate heat for temperature changes and phase transitions using q = mcΔT and q = mL.
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Materials Needed:
- Projector or interactive whiteboard
- PowerPoint slides on KPT and heating curves
- Printed worksheet with curve‑interpretation questions
- Thermometer and sample of ice/water for demonstration
- Calculators for students
- Whiteboard and markers
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Introduction:
Begin with a quick demonstration: melt an ice cube on a hot plate while students predict the outcome. Review prior knowledge of particle arrangement in solids and liquids. Explain that today’s success criteria are to explain state changes using kinetic particle theory and to read heating/cooling curves accurately.
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Lesson Structure:
- Do‑now (5'): Short quiz on particle motion in the three states.
- Mini‑lecture (10'): Present KPT and link kinetic energy to temperature with slides.
- Demonstration (8'): Show melting and boiling of water, discuss energy input and plateaus.
- Guided practice (12'): Analyse a heating curve diagram, identify slopes and plateaus, calculate latent heat.
- Independent activity (10'): Worksheet with calculation problem and curve interpretation.
- Check for understanding (5'): Exit ticket – one sentence explaining what a plateau on a heating curve represents.
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Conclusion:
Recap that particle motion increases with temperature and that phase changes occur at constant temperature, shown as plateaus on heating/cooling curves. Collect exit tickets and clarify any misconceptions. Assign homework: complete a set of heating‑curve problems from the textbook.
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