Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Thermodynamic Properties of Caffeine in Compressed Gas

  • Published : 19950500
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Abstract

The solubility of caffeine in compressed carbon dioxide has been measured to determine its fugacity coefficient between 330 and 410 K up to 500 bar. The result allows the calculation of the thermodynamic excess functions such as the molar excess enthalpy, the molar excess free energy, and the molar excess entropy. The pressure variations of the molar excess functions of caffeine in the caffeine-CO2 mixture were discussed and also compared them with those in the caffeine-NH3 mixture.

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