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Mixing rules are needed in order to

  • A.average the critical properties of all the components present
  • B.get equation of state parameters for a mixture from pure ones
  • C.convert the mole fractions of a mixture into mass fractions
  • D.combine two different equations of state into one single equation

Answer: B

An equation of state has a single a and b, so a mixture requires a rule for combining the pure values. The classical rules are quadratic in composition for a and linear for b. Cross terms then need a binary interaction parameter.

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