Boiling Point - GCSE Physics Definition

The boiling point is the temperature at which a substance changes from a liquid to a gas. At this specific temperature, the liquid's particles have enough energy to overcome the forces holding them together, allowing them to escape as gas or vapour.

For GCSE Physics, it's important to understand that the boiling point can be affected by atmospheric pressure; at higher altitudes, where the pressure is lower, liquids boil at lower temperatures.

For example, the boiling point of pure water at standard atmospheric pressure is 100°C. Understanding boiling points helps in studying phase changes and the energy involved in heating processes.