Adsorption of organic gases/vapors: carbon tetrachloride, methane, and ammonia, on the surface of activated charcoal has been studied manometrically. Detailed examina- tion indicates a difference in the mode of dispersion on the surface of activated charcoal.adsorption equilibrium data were fitted to Freundlich and Langmuir isotherm equations as a function of pressure and temperature. The values of the constants were computed and interpreted.Isosteric heats of adsorption were also calculated using Clausius–Clapeyron equation. From the results,we conclude that ammonia is a better adsorbate on the surface of activated charcoal as compared to carbon tetrachloride and methane.
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