Physics Year 11 - Module 3 - Lesson 18
Latent Heat and Modes of Heat Transfer
1. Key Ideas
Temperature does not always rise when energy is added. During a phase change, energy can go into changing particle arrangement instead of particle kinetic energy. This lesson also closes the module with the three modes of heat transfer: conduction, convection, and radiation.
- What latent heat means
- Why temperature stays constant during a phase change
2. Success Criteria
By the end, you should be able to:
- What latent heat means
- The difference between fusion and vaporisation
- How to read a heating curve
3. Key Terms
4. Activity: Build the Lesson Map
Use the lesson to complete the table. Keep answers brief but specific.
| Prompt | Your answer |
|---|---|
| Main concept | |
| Important example | |
| Common mistake to avoid | |
| How this links to the next lesson |
5. Short Answer Questions
1. 7. Explain why temperature stays constant during a phase change even though energy is still being supplied.
2. 8. Calculate the energy needed to vaporise 0.20 kg of water if the specific latent heat of vaporisation is $2.26 \times 10^6\ \text{J/kg}$.
3. 9. Compare conduction, convection, and radiation, giving one example of each.
6. Extend: Apply the Idea
A student gives a memorised answer about Latent Heat and Modes of Heat Transfer but does not use evidence or reasoning.
Improve the answer by writing a stronger response that uses accurate terminology, a relevant example and a clear explanation.
7. Multiple Choice
1. What is the best first step when answering a question about Latent Heat and Modes of Heat Transfer?
A. Identify the key concept being tested
B. Write every fact from memory
C. Ignore the command word
D. Skip examples and evidence
2. Which answer would show stronger understanding of Latent Heat and Modes of Heat Transfer?
A. An answer with accurate terms and reasoning
B. A copied definition only
C. A single-word response
D. An answer with no example
3. What should you do if a question asks you to explain?
A. Link the idea to a reason or cause
B. List unrelated facts
C. Only draw a diagram
D. Write the shortest possible answer
8. Success Criteria Proof
Finish with evidence that you can do each success criterion.