The laboratory technician carefully observed the vapours rising from the heated solution.

Accurate measurements of vapour pressures are essential for predicting the evaporation rates of these solvents.

The vapour densities of the two chemicals were compared to determine which one posed a greater inhalation risk.

Thin layers of water vapours gathered above the marsh at dawn.

After the long hike, she relaxed in a vapour bath to ease her sore muscles.

After long hikes, the villagers favored vapour baths to soothe their tired muscles.

On long summer drives, older carbureted cars often suffered from vapour locks that stalled their engines.

In the greenhouse, condensation formed on the glass as warm water vapour met the cooler air.

The chemist measured the vapour pressure of the liquid to determine its volatility.

At the thought of public speaking, she began to get the vapours and clutched her notes.