THE DETERMINATION OF ADSORPTION ENTHALPIES OF ~(204) Tl OXIDES BY ISOTHERMAL GAS CHROMATOGRAPHIC AND TIIERMOCHROMATO-GRAPHIC METHODS

The adsorption enthalpies of 204Tl oxides with H2, Ar and air as carrier gases are measured by the isothermal gas chromatagraphy and thermochroma-tography. The results are compared with the theoretical and empirical values. It is confirmed that the three adsorption enthalpies are obtained from three oxides Tl2O3, Tl2O and Tl2O4 because of its different chemical states in the