Question

What is the vapour pressure of water?

Answer 1

This is the equilibrium vapour pressure for the transition.....

Explanation:

....`H_2O(l) rightleftharpoons H_2O(g)`

Now this is a function of temperature...and of course at `100` `""^@C`, `P_(H_2O)=1*atm`. At LOWER temperatures, this vapour pressure is often referred to as the `"saturated vapour pressure"`...and it must be included for gases collected over water.