# If a liquid exerts a vapour pressure at a given temperature is it boiling?

Not unless the liquid vapour pressure is $1 \cdot a t m$.
The $\text{normal boiling point}$ is the temperature at which the vapour pressure of the solution is $1 \cdot a t m$, and bubbles of vapour form directly in the liquid. Typically, we measure the normal boiling points of liquids, and thus we know at a given temperature that their vapour is $1 \cdot a t m$. The magnitude of the boiling point is an excellent indicator of intermolecular force.