CEM 141 Lecture Notes - Lecture 35: Boiling Point, Sodium Chloride, Lattice Energy
Document Summary
Predicting properties (like boiling point) from molecular formulas. Nacl will have a higher lattice energy. Nacl will have the higher melting point (nacl has the smallest ions) Ca2o2 will have the highest lattice energy (due to stronger interactions) Ca2o2 will have the higher melting point (more energy needed to overcome its stronger interactions. To conduct electricity, there must be moving charges. normally we think of electrons as carrying these charges, but that"s not the case for salt. Salt will only conduct electricity in a liquid state. Atoms interact electrostatically interactions range from ldf to bonding (of all kinds). When atoms interact, the system becomes more stable (and loses energy to surroundings). All electrostatic interactions require energy to overcome. The way atoms interact depends on the arrangement of electrons (valence electrons). When atoms form new compounds the properties are emergent (not the sum of the atoms).
