Answer
The heating curve of that process is represented by the drawing:
- The segment represented by "4" corresponds to the boiling of the liquid water, that occurs at 100$^{\circ}$ C.
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Work Step by Step
You can use the Figure 3.8 (Page 81) as the basis to draw the heating curve.
Since the boiling point of water is at $100^{\circ}$, the liquid water absorbs energy and boils at that temperature.
