Content
Citation(s) & Footnote(s)
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Scope And Argument
Printed pp. 33–47; scan PDF pages 38–52.
Vapor composition, the changing liquid left in the pot, and pooled distillate composition are different quantities.
Literature Note
Chapter 2 introduces heat, phase change, partial pressure and vapor–liquid equilibrium. Water, ethanol and congeners can travel together; their different distributions between phases permit enrichment. A wash near 8% ABV can initially yield much stronger vapor, while the average strength of a collected run is lower than that initial vapor. These quantities cannot be substituted for one another.
Raoult’s law is a useful ideal-mixture model when its assumptions hold. Miscibility alone does not make a mixture ideal. Dalton’s law relates partial pressures to total pressure; equilibrium diagrams require a declared composition basis and pressure. Mole fraction is not ABV. Relative volatility compares vapor/liquid distribution ratios for two named components, so the reference component matters.
Several printed details need correction before reuse. On p. 45 the inference that increasing a component mole fraction necessarily lowers total pressure is not a general consequence of the rearranged equation. At fixed temperature an ideal binary mixture has total pressure x₁P₁sat+x₂P₂sat. The outcome depends on which pure-component saturation pressure is larger. On p. 47, 0.89 mole fraction means 89 mol%, not 0.89 mole percent. A diagonal on the equilibrium plot is not horizontal. The azeotrope value should not be detached from pressure and concentration basis.
The author’s central explanation remains useful: a batch follows a changing composition trajectory. The Academy should teach that trajectory qualitatively, then let advanced learners explore rigorously specified equilibrium models. ABV can describe alcohol concentration but cannot identify the entire flavor mixture or certify the identity of trace compounds.
Connections In Our Library
These connections extend the existing production and sensory framework; they do not imply that each linked source has been newly reviewed in full.
Academy Use
Lesson 07: distinguish instantaneous output from pooled spirit with an original weighted-average exercise.
Citation
Matt Strickland, Batch Distillation: Science and Practice (Hayward, CA: White Mule Press, 2021), 33–47. Original synthesis and paraphrase; no reproduced chapter text.
Additional Visual Audit — 28 September 2026
Additional visual inspection: printed p.36 gives 6.0214076 ×10^23 in the mole definition. Check the digits against the authoritative SI definition before copying any numerical teaching material. The equilibrium diagrams remain conceptual and require pressure and composition basis.
