Henry’s law states that “the partial pressure of the gas in vapour phase (p) is proportional to the mole fraction of the gas (x) in the solution” and is expressed as: p = KHx
where KH henry's constant
Molality: Molality (m) is defined as the number of moles of the solute per kilogram (kg) of the solvent and is expressed as:
Molality (m) =
molality are independent of temperature, whereas molarity is a function of temperature. This is because volume depends on temperature
and the mass does not.