In homogeneous nucleation, nuclei consisting of the same substance as the melt trigger solidification. This video takes a closer look at the activation energy required for this and the critical nucleation radius.

00:00 Gibbs energy (free enthalpy)
01:03 Endergonic and exergonic reaction
01:47 Gibbs energy of different states of matter
03:35 Latent heat (heat of transformation)
04:26 Activation energy
05:42 Gibbs energy of a nucleus
06:43 Volume energy
07:18 Supercooling
08:34 Surface energy (surface tension)
09:52 Influence of the nucleus radius on the Gibbs energy
10:50 Critical nucleus radius
13:20 Example
14:33 Free energy barrier for nucleation
16:30 Nucleation rate
18:38 Diagram
20:05 Remarks

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