Henery's Law

Henery's Law:- The partial pressure of the gas in vapour phase is directly proportion to the mole fraction(n) of gas in solution.

Higher the value of K_H at given pressure the lower is solubility of gas in liquid.

The value of K_H increase in the temperature. Thus aquatic species are more comfortable in cold water rather than warm water. Because oxygen is more dissolve in cold water than in warm water.

Application of Henery's law

1. To increase solubility of Co₂  in soft drinks and sod water the bottle is sealed under high pressure.
2. To minimise the painful effects (Bends) accompanying the decomposition of deep sea divers, oxygen is diluted with less soluble 'He' Helium gas is used as breathing gas.
3. At high Altitudes the partial pressure of oxygen is less than ground level. this leads to loe concentration of oxygen in blood and tissues of climbers. Low blood oxygen causes climbers to become weak and unable to think clearly, which cause anoxia.