The strongest direct support in the book for requiring mixture-specific thermodynamic data before making whiskey predictions.
Chapter 5 qualifies the ideal-mixture framework for real behavior.
In real zeotropic mixtures, relative volatility changes with composition, so equilibrium and concentration profiles generally require numerical treatment. Enthalpy–concentration analysis adds realistic temperature, flow, condenser, and reboiler energy relationships that constant-flow ideal models omit.
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5.1, Zeotropic mixtures
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