Module 1 : Introduction to materials

Lecture 4: Carbon chemistry – physical and chemical properties

 

Melting points v structural unit

ionic compounds

High mp. Why?

NaCl has a mp = 801C. Each sodium ion is surrounded by six chloride ions.....the crystal is very strong and the structure rigid.

covalent compounds mp example & inter molecular forces of attraction

Lower mp. Why?

The structural unit is the molecule. What are the intermolecular forces of attraction?