Gen Chem Chapter 2

• Viscosity


  The measure of tendency to resist flowing motion
• Evaporation


  The indication of escape of molecules from the surface of liquid
• Boiling Point


  The temperature at which vapor pressure of a liquid equals the external pressure
• Capillary action


  The spontaneous rising of liquid in a narrow tube that can also be observed in liquid
• Cooling effect of Vaporization


  The amount of heat energy for the given number of molecules is reduced as well as their temperature
• Heat of Vaporization


  The energy required to change exactly one gram of liquid to vapor at its normal boiling point
• Water is the most remarkable substance with simple composition and structure
• Water


  • Has a high surface tension because of strong intermolecular Hydrogen bonding
  • Is an odorless and tasteless liquid
  • Is a polar molecule
  • Dissolves more substances than any liquid because it is the most polar solvent
• Standard atmospheric pressure: 760mmHg or 760 torr
• Freezing point: 0C or 32F
• Boiling point: 100C or 212F