# What factors increase the solubility of gases?

Feb 21, 2017

Higher atmospheric pressure and lower temperature.

SOLUBILITY OF GASES WITH ATMOSPHERIC PRESSURE

As the atmospheric pressure increases, the gas particles at the liquid's surface are being pushed back into solution more.

In accordance with Henry's law for gaseous substance $i$

${s}_{i} = {k}_{H} {P}_{i}$,

where the Henry's law constant ${k}_{H}$ for gas $i$ dissolved in a particular solvent is in units of, e.g. $\text{M/atm}$ if pressure is in $\text{atm}$, the solubility thus increases.

SOLUBILITY OF GASES WITH TEMPERATURE

As you decrease the temperature, the gas moves more slowly, and is thus less prone to escaping the solution. Therefore, its solubility is higher at lower temperatures.