Presentation on theme: "Intermolecular Forces Topic 1: Hydrogen Bonding. Hydrogen Bonding Draw the Lewis Dot Diagram of Water Is it symmetrical horizontally and vertically?____________."— Presentation transcript:
Intermolecular Forces Topic 1: Hydrogen Bonding
Hydrogen Bonding Draw the Lewis Dot Diagram of Water Is it symmetrical horizontally and vertically?____________ Is it polar or non-polar?________________
Hydrogen Bonding Demo of water and a charged ruler What happened when the charged ruler was placed near the water?____________________________ __________________________________ __________________________________ Why did this occur?____________________________ __________________________________ __________________________________
Intermolecular Forces Attractive forces between molecules Different from intramolecular bonds, which are between atoms Different from intramolecular bonds, which are between atoms Intramolecular Bond - between atoms Intermolecular Bond – between molecules
Hydrogen Bonding Hydrogen bonds form between molecules when hydrogen is covalently bonded to small, highly electronegative atoms such as: Oxygen Oxygen Example: H 2 OExample: H 2 O Fluorine Fluorine Example: HFExample: HF Nitrogen Nitrogen Example: NH 3Example: NH 3 How can we remember these? You do a lot of bonding talking with your friends on the FON.
Hydrogen Bonding Hydrogen bonds are strong intermolecular bonds Example: Hydrogen Bonding in Water Hydrogen bond