How does heating water in a steam engine boiler create steam pressure?
I am thinking of doing an instructable on Model steam engines, how they work etcetera, and I am need of a Physicist to explain how the steam in the boiler builds up pressure. I know how the rest of the engines work, but unfortunately I am a bit lost for knowledge on pressure. I could just look at wikipedia or another such website but that defeats the object of the instructable.
The person who explains this best in a way a teenager could understand will get a collab on my Instructable, and subscribe.