Wednesday, January 5, 2011
Wednes-Day 2
Physics - we compared and contrasted the ELECTROSTATIC FORCE vectors with the GRAVITATIONAL FORCE vectors acting on a pair of charged objects.
The electrostatic force is generally much stronger for a charged object than any gravitational attraction to another charged object.
Furthermore, the gravitational force is ONLY attractive, whereas the electrostatic force can be either attractive (unlike charges) or repulsive (like charges).
We did a drill showing how the electrostatic force between two charged objects varies with charge and distance.
We then began to discuss the concept of "electric fields", and how to represent them with lines/arrows around a charged objects.
AP Chem - we finished phase diagrams and the common questions asked about them; we then took on properties of liquids i.e. surface tension and viscosity.
We then discussed vapor pressure, how it is measured, and how it relates to intermolecular forces and temperature of a substance. We saw that SAMPLE SIZE has nothing to do with vapor pressure at a given temperature.
We began to discuss colligative properties; tomorrow, we will do many problems from the derived formulas, using the van' t Hoff factor associated with dissociation of a given ionic compound or ionization of a given acid in solution.
The electrostatic force is generally much stronger for a charged object than any gravitational attraction to another charged object.
Furthermore, the gravitational force is ONLY attractive, whereas the electrostatic force can be either attractive (unlike charges) or repulsive (like charges).
We did a drill showing how the electrostatic force between two charged objects varies with charge and distance.
We then began to discuss the concept of "electric fields", and how to represent them with lines/arrows around a charged objects.
AP Chem - we finished phase diagrams and the common questions asked about them; we then took on properties of liquids i.e. surface tension and viscosity.
We then discussed vapor pressure, how it is measured, and how it relates to intermolecular forces and temperature of a substance. We saw that SAMPLE SIZE has nothing to do with vapor pressure at a given temperature.
We began to discuss colligative properties; tomorrow, we will do many problems from the derived formulas, using the van' t Hoff factor associated with dissociation of a given ionic compound or ionization of a given acid in solution.
# posted by C @ 2:15 PM 
