Why do some molecules separate under extreme heat?

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Why does heat cause certain things to break into their basic elements?
 
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Because the average kinetic energy of the individual atoms in the molecule becomes larger than the binding energy of the chemical bonds holding them together.
 
alxm said:
Because the average kinetic energy of the individual atoms in the molecule becomes larger than the binding energy of the chemical bonds holding them together.

I understand, thank you.
 

Thread 'Instantaneous dipole moment and orbitals'

Hi. I have got question as in title. How can idea of instantaneous dipole moment for atoms like, for example hydrogen be consistent with idea of orbitals? At my level of knowledge London dispersion forces are derived taking into account Bohr model of atom. But we know today that this model is not correct. If it would be correct I understand that at each time electron is at some point at radius at some angle and there is dipole moment at this time from nucleus to electron at orbit. But how...
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