Memorandum

To:       CHM 1045 Recitation Instructors
          Dillhyon, Martin, Callihan, Guile

From:     Robley Light

Date:     April 15, 1996

Re:       Recitation 14, week of April 15


Return tests and go over them.  Double check your recitation grades
with the students, and get them to me by the end of the week if you
can.

Review as much as you can of the following topics from Chapter 11:

Intermolecular forces:
     Charged species:  ionic bonding, ion-dipole
     Neutral species:  hydrogen bonding, dipole-dipole, dispersion
Predict relative boiling points of various substances.
Water structure and H-bonding.
Properties of liquids:  viscosity, surface tension, vapor pressure
Effect of temperature on vapor pressure.  Comparison of vapor
     pressure of different species--relation to intermolecular
     forces.  (I mentioned the Clausius-Clapeyron equation, but
     will not make them responsible for it except to know that the
     effect of T on vapor pressure depends on the delta H of
     fusion).
Heating curve of water.
Phase diagrams:  general case, and specific case of CO2 and H2O
     Critical point; triple point; note slope of ice/water curve.
Types of solids (Table 11.6)
Unit cells:  cover 3 examples:
     primitive cubic, body-centered cubic, face-centered cubic
     number of atoms per unit cell in each
Close packing of spheres:  hexagonal and cubic


Make-up exams are on Friday:  
               Room 113 HTL at 8:00; room 219 HTL at 12:20  (Can
               one of you be at the room at the designated time,
               the other meet in the lecture hall to bring other
               students over?  One should then be enough to
               proctor).

Let me know if you can schedule a help session late this week or
early next week, and when and where it will be.