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Introduction to Kinetics

Kinetics: The study of the rates of chemical reactions
  • While thermodynamics can tell us which reactions are possible (spontaneous or nonspontaneous) it cannot give us any information about how long the reaction will take.
  • The most famous example of this is diamonds.
C(diamond)C(graphite)ΔG<0\begin{array}{c} \rm C_{(diamond)}\quad\overrightarrow{\hspace{1.5cm}}\quad C_{(graphite)}\\[10pt] \Delta G<0 \end{array}
  • So if the reaction from diamond to graphite is spontaneous why do diamonds last forever?
  • The rate of this reaction is so slow, that the Sun will become a red giant and consume the earth before any diamonds spontaneously change phase to graphite.