Effect of Decreased Atmospheric Pressure on Boiling Point of Liquid
When atmospheric pressure decreases, the boiling point of a liquid also decreases. This phenomenon can be explained by the relationship between boiling point and atmospheric pressure.

Boiling Point and Atmospheric Pressure
- The boiling point of a liquid is the temperature at which its vapor pressure equals the atmospheric pressure.
- As atmospheric pressure decreases, the vapor pressure required for the liquid to boil is also reduced.

Role of Atmospheric Pressure
- Atmospheric pressure plays a crucial role in determining the boiling point of a liquid.
- Higher atmospheric pressure compresses the vapor molecules above the liquid, making it harder for them to escape and reach the pressure required for boiling.
- Lower atmospheric pressure reduces the pressure exerted on the liquid surface, allowing the vapor molecules to escape more easily, thus lowering the boiling point.

Impact on Boiling Point
- When atmospheric pressure decreases, the required vapor pressure to achieve boiling is also reduced.
- This results in a lower boiling point for the liquid, as it can now boil at a lower temperature due to the decreased pressure.

Conclusion
In conclusion, a decrease in atmospheric pressure leads to a lower boiling point of a liquid due to the reduced pressure required for vaporization. Understanding this relationship is crucial in various applications, such as cooking, distillation, and chemical processes.