What is a chemical bond according to molecular orbital theory?
CHEM 101_Dr. Emil Lecture Notes and In-class problems. CHAPTER 5 NOTES OUTLINE: 5.1 Changes of State 5.2 The Gas Laws 5.3 Gas Mixtures and Partial Pressures 5.1 Changes of State Changes of state are the processes of going from one physical state to another physical state. A change of state is a physical change because covalent bonds are not formed or broken in the process. There are no intermolecular forces in the gas phase but intermolecular forces exist in the liquid phase, and are even more abundant in the solid phase. A change of state from the solid to the liquid phase is melting; the reverse is freezing. A change of state from liquid to gas is vaporization or evaporation; the reverse is condensation. A