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Fusion (melting)
On the 0 C plateau, heat goes into breaking the ice lattice, not into raising temperature. For water, Lf is about 3.34 x 10^5 J/kg. The same energy is released when 1 kg of water freezes.
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Fusion (melting)
What is it?
On the 0 C plateau, heat goes into breaking the ice lattice, not into raising temperature. For water, Lf is about 3.34 x 10^5 J/kg. The same energy is released when 1 kg of water freezes.
In simple words
- On the 0 C plateau, heat goes into breaking the ice lattice, not into raising temperature.
- 0 C plateau
- breaking the lattice
- constant temperature
Important terms
Fusion (Melting): On the 0 C plateau, heat goes into breaking the ice lattice, not into raising temperature. For water, Lf is about 3.34 x 10^5 J/kg. The same energy is released when 1 kg of water freezes.
What you should learn
- Define and explain fusion (melting).
- Apply fusion (melting) to a focused FBISE question.
- Check the answer for correct terms, evidence, working, and units.
Examples
- 0 C plateau
- breaking the lattice
- constant temperature
CORE UNDERSTANDING
On the 0 C plateau, heat goes into breaking the ice lattice, not into raising temperature. For water, Lf is about 3.34 x 10^5 J/kg. The same energy is released when 1 kg of water freezes.
EXAM APPLICATION
State the correct term, connect it to the chapter rule or evidence, and use a clear example or calculation.
Recommended for Class 10
Full school-level explanation
On the 0 C plateau, heat goes into breaking the ice lattice, not into raising temperature. For water, Lf is about 3.34 x 10^5 J/kg. The same energy is released when 1 kg of water freezes.
Learn the idea, then use it:
WHAT — FUSION (MELTING)
On the 0 C plateau, heat goes into breaking the ice lattice, not into raising temperature. For water, Lf is about 3.34 x 10^5 J/kg. The same energy is released when 1 kg of water freezes.
HOW — Use the idea
Identify what is given, select this topic's rule or evidence, apply it one step at a time, and check the result.
CORE UNDERSTANDING
On the 0 C plateau, heat goes into breaking the ice lattice, not into raising temperature. For water, Lf is about 3.34 x 10^5 J/kg. The same energy is released when 1 kg of water freezes.
Remember
- 0 C plateau
- breaking the lattice
- constant temperature
Examples
- 0 C plateau
- breaking the lattice
- constant temperature
- FUSION (MELTING): On the 0 C plateau, heat goes into breaking the ice lattice, not into raising temperature. For water, Lf is about 3.34 x
EXAM APPLICATION
State the correct term, connect it to the chapter rule or evidence, and use a clear example or calculation.
Remember
- correct term
- chapter link
- clear application
Examples
- Define first
- Show the rule or evidence
- Check units, labels, and conclusion
Remember
- 0 C plateau
- breaking the lattice
- constant temperature
- keep the ideas separate
- 0 C plateau
- breaking the lattice
- constant temperature
- correct term
Deeper understanding
Go beyond memorising Fusion (melting). Connect the definition to reasons, relationships, exceptions, and exam wording.
Common mistakes
Exam focus
Core Idea
Key Points
Simple Check
How to Answer
Exam focus
Quick revision
- 0 C plateau
- breaking the lattice
- constant temperature
- keep the ideas separate
- Fusion (Melting): On the 0 C plateau, heat goes into breaking the ice lattice, not into raising temperature. For water
- WHAT — FUSION (MELTING): On the 0 C plateau, heat goes into breaking the ice lattice, not into raising temperature. For water
Do not merge fusion (melting) with a neighbouring idea that uses a different definition, rule, or method.
For long answers on Fusion (melting): define clearly → explain the main parts → give one example → state one exam caution.
Exam Focus
Exam Focus
Important points
- 0 C plateau
- breaking the lattice
- constant temperature
- keep the ideas separate
Important formulas
- 0 C plateau
- breaking the lattice
- constant temperature
Common exam traps
- Do not merge fusion (melting) with a neighbouring idea that uses a different definition, rule, or method.
- Do not invent a formula, fact, unit, or diagram label that the chapter does not support.
Long question structure
Definition → key parts → example → exam caution
Common Mistakes
Common Mistakes
- Mistake
Do not merge fusion (melting) with a neighbouring idea that uses a different definition, rule, or method.
- Mistake
Do not invent a formula, fact, unit, or diagram label that the chapter does not support.
- Mistake
Do not merge fusion (melting) with a neighbouring idea that uses a different definition, rule, or method.
Revision Zone
60-Second Revision
Quick cues from this topic — use them for last-minute revision.
0 C plateau
breaking the lattice
constant temperature
keep the ideas separate
On the 0 C plateau, heat goes into breaking the ice lattice, not into raising temperature. For water, Lf is about 3.34 x 10^5 J/kg. The same energy is released
- Definition
- On the 0 C plateau, heat goes into breaking the ice lattice, not into raising temperature. For water, Lf is about 3.34 x 10^5 J/kg. The same energy is released
- Example
- 0 C plateau
- Critical warning
- Do not merge fusion (melting) with a neighbouring idea that uses a different definition, rule, or method.
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Exam Practice
Define
Q1. Define Fusion (melting).
Explain
Q2. Explain: CORE UNDERSTANDING.
Example
Q3. Give one clear example of Fusion (melting) and say why it fits.
Mistake
Q4. State one common mistake students make about Fusion (melting).
Exam note
Q5. Write a short exam note on Fusion (melting): definition, two points, one example.
Sources & References
School-standard facts for Matric and Intermediate. Original explanations — not copied from textbooks.