SOLUTION



   HENRY LAW -  At constant temperature , the solubility of gas in liquid is directly proportional to partial pressure of the gas present above the surface of liquid of solution .


 Partial pressure of a gas in the vapour phase is proportional to to the mole fraction of the gas(x) in the solution .


                                      P  directly proportional to X
                               
                                     P = KhX

         Kh - Henry's contant

    It depends upon :  Nature of the gas and temperature


  Solubility of a gas is inversely proportional to the temperature

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

 Solubility of gases increases with decrease of temperature , therefore, aquatic species are comfortable
 in cold waves