This task is about melting and boiling points of substances.
Use this table to answer the questions below.
| Substance | Melting Point °C | Boiling Point °C |
| Aluminium | 660 | 1800 |
| Iron | 1535 | 2750 |
| Nitrogen | – 210 | – 196 |
| Oxygen | – 218 | – 183 |
| Sodium chloride | 804 | 1413 |
| Water | 0 | 100 |
| a) |
What is the melting point of iron? __________°C
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| b) |
At what temperature does water turn from a liquid to a gas? __________°C
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| c) |
At 680°C, is sodium chloride a solid, liquid, or gas? __________
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| d) |
Which substance remains liquid over the greatest temperature range? ____________________
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| e) |
Name the substances which are liquid at 1000°C.
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| f) |
If a mixture of oxygen and nitrogen was cooled, which one would freeze first? ____________________
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| g) |
At what temperature does aluminium freeze? __________°C
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| h) |
If the six substances above were at room temperature how many would be in a:
solid state? __________
liquid state? __________
gas state? __________
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