# Do solids and liquids exert a vapour pressure?

Jul 8, 2017

I am not entirely clear as to what you are asking........

#### Explanation:

Liquids (and some solids) do exert an $\text{equilibrium vapour pressure}$...... i.e.

$\text{Liquid "rightleftharpoons" Gas}$

The extent of the equilibrium is a function of temperature, and at the liquid's $\text{normal boiling point}$, the vapour pressure of the solution is $1 \cdot a t m$. At temperatures LESS than the normal boiling point, a vapour pressure will still be exerted. For water, the vapour pressures are extensively tabulated.......and of course must be accounted for when we collect a volume of gas by water displacement.

Sometimes, the vapour pressures are reported in $\text{mm Hg}$, and thus this measurement can be subtracted from the atmospheric pressure of $\text{760 mm Hg}$,