1. The boiling temperature of pure water is equal to 0 °C. TRUE FALSE
2. The melting temperature of a pure substance is the same as its freezing temperature. TRUE FALSE
3. A plateau is a vertical segment on a heating or cooling curve. TRUE FALSE
4. The heating curve of a mixture shows a plateau corresponding to a phase change. TRUE FALSE
5. The cooling curve of pure water shows a plateau at 0 °C. TRUE FALSE
6. The vertical axis of the heating curve is the time axis and the horizontal axis is the temperature axis. TRUE FALSE
7. The temperature of the plateau on a heating curve allows identifying the pure substance studied. TRUE FALSE
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