Saturated Vapour:
When in a closed space at a fixed temperature vapour confined exerts the maximum possible pressure, the vapour is called saturated.
![Difference between Saturated and Unsaturated Vapour](https://scienceeureka.com/wp-content/uploads/2024/02/Difference-between-Saturated-and-Unsaturated-Vapour.png)
Unsaturated Vapour:
At a fixed temperature, if the pressure exerted by vapour confined in a closed space is less than its maximum, the vapour is called unsaturated.
![Difference between Saturated and Unsaturated Vapour](https://scienceeureka.com/wp-content/uploads/2024/02/Difference-between-Saturated-and-Unsaturated-Vapour-2.png)