Chemical elements
    Physical Properties
      Diffusion of Gases
      Solubility of Gases
      Colloidal Platinum
      Solid Hydrosol
      Platinum Black
      Atomic Weight
    Chemical Properties
    PDB 1a2e-2bho
    PDB 2ch8-3un9
    PDB 3vdk-5bna

Solubility of Gases in Platinum

The solubility of hydrogen in platinum has been studied by Sieverts, who has shown that the gas is less soluble in compact platinum than in the same weight of iron or nickel. At constant pressure the solubility rises with the temperature, whilst at constant temperature the amount of hydrogen absorbed is directly proportional to the square root of the pressure. On cooling, all the hydrogen absorbed at higher temperatures by the metal is evolved.

Platinum does not absorb carbon dioxide or sulphur dioxide. Platinum which has been heated to a high temperature in a current of hydrogen is usually found to have undergone a slight permanent change, its melting-point being depressed and its ductility reduced. This, however, appears to be due to the absorption of small quantities of carbon from traces of organic impurity in the hydrogen, and not to the influence of the pure hydrogen itself.

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