Intermolecular Forces. (rev. 12/15/09). Objectives. SWBAT: Distinguish between different types of intermolecular forces. Complete a heating or cooling curve calculation. Intermolecular Forces.
the strengths of intermolecular forces are much weaker than
(ionic or covalent bonds).
(forces between molecules)
are weaker than
Intramolecular Forces (The Chemical Bonds within an Individual Molecule).
the ions of the salt dissociate from each other and associate with the dipole of the water molecules. This results in a solution called an Electrolyte.
exist primarily between
non-polaratoms or molecules, (including noble gases)
1. large polarity of the bond
2. close approach of the dipoles (allowed by the very small size of the hydrogen atom)
occurs between all polar and non-polar molecules
it tends to bead as droplets, which is a phenomenon that depends on the intermolecular forces.
Heat of vaporization
Heat of fusion
(1) is ice(2) is ice and liquid water (melting)(3) is liquid water(4) is liquid water and vapor (vaporization)(5) is water vapor
The point where the three lines intersect in a phase diagram shows the pressure and temperature where the solid, liquid, and vapor all exist in equlibrium. This point, which occurs for water at 0.01°C (32.02°F), is known as the triple point.http://encarta.msn.com/media_461541579/phase_diagram_for_water.html
(i.e. sublimation, melting, freezing, etc.)
term “critical point” on a phase diagram?
General Phase Diagramhttp://images.google.com/imgres?imgurl=http://kramerslab.tn.tudelft.nl/~rob/Courses/PhysicsOfFluids/Figures%2Bmovies/PhaseDiagram.jpg&imgrefurl=http://kramerslab.tn.tudelft.nl/~rob/Courses/PhysicsOfFluids/html-lectures/Lecture1.1.html&usg=__kgqG_EuLDs-byFSuKYNB_JM-HTQ=&h=315&w=412&sz=19&hl=en&start=5&tbnid=vuK0Mfhoi9N4aM:&tbnh=96&tbnw=125&prev=/images%3Fq%3Dphase%2Bdiagram%26gbv%3D2%26hl%3Den
1 atm is the normal boiling point of the substance.