1. In the heating curve the iron, describe the phase change that occurred between points D and E on the graph?
2. Explain why the temperature stayed constant between points D and E.
3. What is the melting temperature of iron ?
4. What is the freezing point of iron ? How do you know ?
5. What is the boiling temperature of iron?
6. Compare the boiling temperature of iron and water ( water boils at 100°c ). Which substance has stronger intermolecular forces ? How do you know ?
Answers: 3
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