Boiling Point

The boiling point of a substance is the temperature at which the vapor pressure of the liquid equals the external pressure surrounding the liquid, and the liquid changes into a gas. This is also the temperature at which a substance changes from a liquid to a gas throughout the bulk of the liquid.

Factors Affecting Boiling Point

The boiling point of a substance can be affected by several factors:

• Pressure: Higher pressure increases the boiling point, while lower pressure decreases the boiling point.
• Intermolecular forces: Substances with stronger intermolecular forces will have higher boiling points.
• Molecular weight: Substances with higher molecular weights generally have higher boiling points.

Study Guide

Here are some key points to remember about boiling point:

1. Boiling point is the temperature at which a substance changes from a liquid to a gas.
2. It is affected by pressure, intermolecular forces, and molecular weight.
3. Boiling point can be used to identify and classify substances.
4. Water has a boiling point of 100°C (212°F) at standard atmospheric pressure.

Understanding the concept of boiling point is important in various scientific fields, including chemistry, physics, and environmental science.

Remember to consider the specific conditions and factors that can affect the boiling point of a substance when conducting experiments or analyzing data.

Now that you have a better understanding of boiling point, you can explore its applications and significance in different areas of science.