Vaporization and pressure

[brood910]

---

Members do not see this ad.

Can anybody tell me why vaporizing liquid in a closed system, like a pressure cooker, increases atmospheric pressure? I just wanted to know the concepts behind how a pressure cooker works..

 

[Cmdr_Shepard]

Pressure on the walls of a container is based on how many atoms/molecules of gas collide with the walls of the container per unit area.

Vaporizing a liquid in a closed system (not letting any vapor escape), is essentially putting more atoms/molecules into the gas phase. Thus leads to more pressure.

 

[brood910]

Pressure on the walls of a container is based on how many atoms/molecules of gas collide with the walls of the container per unit area.

Vaporizing a liquid in a closed system (not letting any vapor escape), is essentially putting more atoms/molecules into the gas phase. Thus leads to more pressure.

Thank you so much!
So is it basically PV = nRT, where n increases while V is constant?

 

[Cmdr_Shepard]

Yep. Pretty much.