Published on May 13, 2010
Intermolecular Forces and Physical Properties K Warne For FULL presentation click HERE >> www.warnescience.net
Intermolecular forces • Two different types of bonds occur in water. • Intramolecular – Between hydrogen atoms and oxygen atoms inside the molecules Covalent bonds H + H O - • Intermolecular – Between two different water molecules Hydrogen SAMPLE bonds ONLY SAMPLE ONLY For FULL presentation click HERE >> www.warnescience.net
Molecular solids Strong covalent bonds Iodine - I2 PROPERTIES • Low melting points • Brittle • Soluble in non-polar solvents • Non - conducting Weaker intermolecular bonds Covalently bonded molecules held together by weaker intermolecular bonding. SAMPLE ONLY SAMPLE ONLY For FULL presentation click HERE >> www.warnescience.net
Intermolecular Forces Hydrogen Bonds Ion-dipole Ion-induced Dipole Van der Waals Forces Dipole-dipole Dipole-induced Dipole Momentary Dipole (London) For FULL presentation click HERE >> www.warnescience.net
IMF vs Mp & Bp Molecular Mass (Mr g.mol-1) Flourine 19 x 2 = F2 pale yellow gas 38 Chlorine Cl2 pale green gas 35.5 x 2 = Bromine 80 x 2 = Br2 red volatile liquid 160 Iodine 127 x 2 = I2 purple solid - sublimes 254 71 Mp & Bp increases with SIZE and molecule MASS .. Halogen : X . X2 (diatomic) . . Mp / Bp (oC) -220 / -188 -101/ -35 -7 / 59 114 / 184 For FULL SAMPLE ONLY presentation click HERE >> www.warnescience.net SAMPLE ONLY
Viscosity • Viscosity is a measure of how thick (viscous) and sticky a liquid is. • Viscosity reduces the ability of a liquid to flow. • Liquids that flow readily (water) have a low viscosity. • Viscosity is a function of (depends on) the attractive forces of the molecules of the liquid. • Strong forces – high viscosity • Temperature also greatly affects viscosity: as temperature increases, viscosity decreases. SAMPLE ONLY Kinetic energy enables particles to overcome forces. SAMPLE ONLY
WarneScience Hi… This is a SAMPLE presentation only. My FULL presentations, which contain a lot more slides and other resources, are freely available on my resource sharing website: www.warnescience.net (paste into your browser if link above does not work) Have a look and enjoy! Keith Warne For FULL presentation click HERE >> www.warnescience.net
Intermolecular Forces . Intramolecular forces (bonding forces) exist within molecules and influence the chemical properties. Intermolecular forces exist ...
The physical properties of melting point, boiling point, vapor pressure, evaporation ... These attractive forces are called Intermolecular Forces.
Intermolecular forces are the forces that cause the attraction of one molecule to another. Bonds are the forces within molecules that hold the atoms together.
Learn about important intermolecular forces of attraction (van der Waal forces) and how they influence the properties of substances.
Intermolecular forces Electrostatics Up until now, we have just discussed attractions between molecules in the area of the covalent bond.
DISCOVERY Intermolecular Forces and Physical Properties A. What is chemically special about each type of intermolecular force? While ionic and covalent ...
Intermolecular forces control how well molecules stick together. This affects many of the measurable physical properties of substances: Melting and Boiling ...
Chapter 11 –focus points: Intermolecular forces and their effect on properties of liquids Intermolecular (or interparticle ) forces are weak interactions ...
Intermolecular Forces Reading: Ch 14 sections 3 -6 Homework: 14.3 questions 20, 22*, 24,26 * = „important‟ homework question Background Discussion ...
This lesson looks at the relationship between intermolecular properties and the physical properties of compounds.