Chapter 17 - Section 17.2 - Phase Changes - Conceptual Example - Page 308: 17.1

Work Step by Step

This graph will feature a line with a positive slope until it hits the horizontal line $y=0$, at which point the slope will be 0 for a little while. Then, the slope will be positive again until it hits the horizontal line $y=100$, at which point the slope will be 0 for a little while again. This occurs because when the water goes through a phase change, it does not change temperature while it is at the melting/boiling point: rather, all of the energy goes to melting or boiling the water.

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