Question
The sigmoidal behavior of this process can be modeled using the Avrami equations. For 10 points each:
[10m] Name this process that precedes crystal growth during crystallization. Silver iodide is typically used as a seed for this process during artificial cloud formation.
ANSWER: nucleation [accept description indicating the formation of a nucleus or nuclei; accept cloud condensation nuclei; prompt on condensation or freezing or deposition]
[10e] The Avrami equations model the progression of nucleation in systems in this state of matter. Gases transition directly into this state of matter during deposition.
ANSWER: solids [accept solid-state reactions]
[10h] Should they progress via a sigmoidal fashion, reactions of this type can be modeled using the Prout-Tompkins solid-state equation. It’s not non-equilibrium, but reactions of this kind can also be studied using the Brusselator model or Soai reaction.
ANSWER: autocatalytic reactions [or autocatalysis; prompt on oscillatory reactions or clock reactions; reject “catalysis”]
<Kane Nguyen, Chemistry>
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