Freezing Point

The freezing point of a substance is the temperature at which it changes from a liquid to a solid state. This temperature is unique to each substance and is an important property that can be used to identify and characterize different materials.

Factors Affecting Freezing Point

• Pressure: In general, an increase in pressure will lower the freezing point of a substance, while a decrease in pressure will raise the freezing point.
• Impurities: The presence of impurities in a substance can lower its freezing point, a phenomenon known as freezing point depression.
• Molecular Structure: The molecular structure of a substance can also affect its freezing point. Substances with more complex molecular structures tend to have higher freezing points.

Examples of Freezing Points

Here are some common freezing points of substances:

Study Guide

Here are some key points to remember about freezing point:

1. What is the freezing point of a substance?
2. How does pressure affect the freezing point?
3. What is freezing point depression?
4. Give examples of substances and their freezing points.

Be sure to review these concepts and practice identifying freezing points of different substances to solidify your understanding of this topic.