Phase equilibrium isotope effects in molecular solids and liquids. Vapor pressures of the isotopic carbon dioxide molecules

@article{Bilkadi1975PhaseEI,
  title={Phase equilibrium isotope effects in molecular solids and liquids. Vapor pressures of the isotopic carbon dioxide molecules},
  author={Zayn Bilkadi and M. W. Lee and J. Bigeleisen},
  journal={Journal of Chemical Physics},
  year={1975},
  volume={62},
  pages={2087-2093}
}
The vapor pressures of samples of CO2 enriched in 13C and 18O have been compared with normal CO2 over the temperature range 154−217°K. Over the entire temperature range the order of the vapor pressures is P13CO2 > P12CO2 > PC18O2. The results are explained by the small shift in the internal vibrations, which dominate the carbon isotope effect, and hindered rotation in the solid and liquid. While the isotope effect on melting is small for carbon substitution, it is found to be large for oxygen… Expand
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