Question

Examine the graph below. Discuss the differences in how water behaves compared to other substances while taking into account how much water changes in volume as its temperature rises from 0°C. What is the name for this behaviour shown by water?

Answer 1

The name for this behaviour shown by water is Anomalous Expansion of Water.

Discussion of Differences:

• Normal Substances: Almost all common liquids continuously expand when heated, meaning their volume increases steadily as the temperature rises.
• Water's Unique Behaviour (0°C) to (4°C): When water is heated from 0°C to 4°C, it contracts instead of expanding. As a result, its volume decreases until it reaches its minimum value exactly at 4°C (where its density becomes maximum).
• Behaviour Above 4°C: Once the temperature rises beyond 4°C, water starts behaving normally like other liquids,it expands, and its volume increases continuously as shown in the graph.