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A residual property is defined as the difference between

  • A.the property of a mixture and that of its pure components
  • B.the real property and its value at the critical point itself
  • C.the real property and its ideal gas value
  • D.the property evaluated at two different temperatures

Answer: C

Splitting a property this way lets the easy ideal gas part come from heat capacity data and the correction come from an equation of state. Residual and excess properties are different ideas and are frequently confused.

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