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The Wilson equation has the notable limitation that it

  • A.cannot predict liquid-liquid phase splitting
  • B.requires more than two parameters per binary
  • C.applies only to hydrocarbon mixtures
  • D.cannot be extended to multicomponent systems

Answer: A

Its mathematical form simply cannot produce two liquid phases, which is why NRTL was developed for partially miscible systems. It extends to multicomponent mixtures from binary parameters well. Its two parameters are regressed from binary data.

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