CAIE IGCSE Physics Energy During Melting and Boiling
Practise explaining why energy enters a substance during melting or boiling without raising temperature and apply specific latent heat where required.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- identify flat heating-curve sections as melting or boiling at constant temperature
- explain that transferred energy overcomes attraction and increases particle potential energy
- calculate latent energy, mass or specific latent heat using E = mL with consistent units
2.2.3.1—Melting and boiling in terms of energy question 1
[Maximum number: 1]
A pure substance is heated slowly. The temperature of the substance is measured as it starts to melt and when it finishes melting.
Which statement is correct?
A
The temperature decreases slightly as the substance melts.
B
The temperature fluctuates as the substance melts.
C
The temperature increases as the substance melts.
D
The temperature stays the same as the substance melts.
D
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