Non-polar covalent substances, thermal conduction

[restrential]

Does anyone know why non-polar covalent substances are poor thermal conductors? I don't remember ever learning that, and I have trouble reasoning why.

Is it because non-polar covalent substances (e.g. hydrocarbons) have lower specific heats than polar counterparts (e.g. water)? Actually, I don't think I understand why that is either...

Enlighten me?

---

Members don't see this ad.