In pressure cookers, evaporation and condensation equilibrium.
![Drawing of pressure cooker with water molecules in equilibrium-same amount evaporating as condensing](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/wss-property-vapor-pressure-cooker-equilibrium.jpg?itok=GR1frHGv)
Detailed Description
Vapor pressure is constant when there is an equilibrium of water molecules moving between the liquid phase and the gaseous phase, in a closed container.
Sources/Usage
Public Domain.