# Hennery’s law

According to Henry, “The ratio of concentration of a gas in the liquid phase to that in the gaseous phase is constant at constant temperature”.

i.e.  $\dfrac{m}{p} = \dfrac{c_1}{c_2}$

Or “The mass of the gas (m) that dissolves in a given volume of the liquid at a constant temperature is proportional to the partial pressure (p) of the gas in equilibrium with the liquid”.

i.e. $m \propto p$ or m = kp

where ‘k’ is called Henry constant.

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