1. The temperature at which a substance melts or boils depends upon the strengths of the intermolecular forces. What must happen for a substance to melt in terms of particles, intermolecular forces, and energy?
2. What must happen in terms of particles, intermolecular forces, and energy for a given substance to boil?
3. Match Iron(II) oxide, Potassium Chloride, Aluminum Nitride with the following melting points: 770 C, 1369 C, 2200C.