Question
The sigmoidal behavior of this process can be modeled using the Avrami equations. For 10 points each:
[10m] Name this process in which groups of molecules and atoms come together to form a new thermodynamic phase. This process follows crystal growth during crystallization.
ANSWER: nucleation [accept description indicating the formation of a nucleus or nuclei]
[10e] The Avrami equations model how nucleation should progress in systems in this state of matter. Gases are transformed directly into this state of matter during deposition.
ANSWER: solids [accept solid-state reactions]
[10h] Should they progress in a simplified sigmoidal fashion, reactions of this type can be modeled using the Prout-Tompkins solid-state equation. In the 1960s, Ilya Prigogine (“pree-GOH-jeen”) developed the Brusselator model to study reactions of this kind.
ANSWER: autocatalytic reactions [or autocatalysis; prompt on oscillatory reactions or clock reactions; reject “catalysis”]
<Kane Nguyen, Chemistry>
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