1. Closed systems cannot exchange matter with the surroundings, but can exchange energy . 2. Exchange energy of adjacent moments increases as the angle between the two moments increases.3. An exchange energy functional was added by Dirac in 1928. 4. This difference in energy is called the exchange energy . 5. Nuclear fusion, nuclear fission, and even your generic chemical reaction all exchange energy for mass. 6. Exchange energy splittings are very elusive to calculate for molecular systems at large internuclear distances.7. The exchange energy tends to favor configurations where the magnetization varies only slowly across the sample. 8. The charge carrier exchanges energy with one of the polar optical modes of the crystal lattice. 9. The charge carrier exchanges energy with an acoustic mode of the vibration of atoms in the crystal lattice. 10. In particular, for a constant density " ? ", the exchange energy density is proportional to " ?"
