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     Physical Property

 

     Density and state: 2.551g/l, gas (standard condition)
 

           Solubility: 9.4g/ml (25 ℃)
 

           Color state: colorless at room temperature
 

           Melting point: - 72.4 ℃ (200.75k)
 

           Boiling point: - 10 ℃ (263K)
 

           Chemical property
 

           Sulfur dioxide can be formed when sulfur is burned

 

      S(s)+O2(g)→SO2(g)

 

      Hydrogen sulfide can be burned to produce sulfur dioxide

 

      2H2S(g)+3O2(g)→2H2O(g)+2SO2(g)

 

      Sulfur dioxide can be produced by heating pyrite, sphalerite and mercuric sulfide

 

      4FeS2(s)+11O2(g)→2Fe2O3(s)+8SO2(g)

 

      2ZnS(s)+3O2(g)→2ZnO(s)+2SO2(g)

 

      HgS(s)+O2(g)→Hg(g)+SO2(g)